The ElectraStim SensaVox E-Stim Power Box

Vendor: ElectraStim

It is becoming a bit of a tradition that after each E-Stim Special I am getting inundated with questions about toys I have not reviewed yet. Despite having already reviewed half a dozen different power boxes there are still popular models out there which I have not covered. This review should answer a few of these questions.


Like most premium e-stim power boxes the SensaVox comes in a sturdy black carrying case. The inside is lined with foam which has cut outs for the power box, a (spare) battery, the audio adapter and space for cables and accessories. If use the SensaVox just with batteries when playing outside your playroom there is enough space for some pad electrodes, conductive loops, e-stim sounds and even a small bi-polar electrode. But when you open the case for the first time, it is packed with stuff: First there are the essential things like the actual power unit, two 2mm right-angle plug to 2mm pin leads, a 9V battery and an adaptable power supply for all four major socket systems (EU, UK, USA and Japan). The explore the audio features it comes with a line-in cable, a 3.5mm female-to-female adaptor for enhancing the line-in’s cable length, a microphone, a CD-ROM with audio files and manuals in multiple languages. Of cause there is printed a full colour manual in English. For a detailed overview of the box’s content read my unboxing.

The ElectraStim SensaVox with all the Standard Accessories

The SensaVox is one of the larger power boxes measuring 145x81x34mm and weighing 245g equipped with a battery and ready for play. The case is made out of a black polymer with now flex so it has a quality feel. The control panel is charcoal coloured with a bit silver dazzle.

In the top left corner there is the power button. In the left corner you find the Boost button which will increase the output power by 25% as long as it is pressed. Between the two buttons is the modify knob which modifies the selected programs. Below the two buttons at the top there is a red LED segment display and a knob below them on each side. They are to control and display the output level of the two channels. If the channel fires a red LED below the know flashes. Just below the middle of the front there are two arrow buttons flanking a blue LED segment display which are for selecting and indicating the program which the two channels will fire.

The SensaVox with all LED Indicators and Display Turned On

The socket for the power supply is located on the left side of the SenvaVox. On top are the 2mm sockets to plug in the leads for the two channels. On the right side are two 3.5mm sockets. The left one is for the line-in, the right one is the microphone input. The back side is covered with a sticker which not only labels the sockets on the side but also provides an overview which program corresponds with the program number. On the bottom of the back there is the battery compartment.

Playing with it

To get the box ready for action, press the power button, wait 2 seconds for the self-test to finish and then you are good to go. For safety reasons connect the leads first with the electrodes and then plug them into the box. The SensaVox will always boot to the first program. Also, regardless of the position of the knobs controlling the channels’ intensity or the modification they are always (re)set to zero when starting the box or changing the channel. When the channels’ intensity is zero, you can twist the knob counter clock-wise without changing the intensity. I would recommend always turning the know to the 6-o’clock position which with all my other power boxes is associated with the zero position. When starting from this position it takes four complete turns from 0 to the max level of 99. So when starting out at the zero position you have some rough idea in the intensity region you are by just feeling the indicator of the knob. When you turn the knob to quickly the box won’t recognize the input so pace yourself a bit. When you want to punish your sub quickly, press the boost button which will increase the output power on both channel by 25% as long as the button is pressed.

Program Number Program Name Sensation Modify Know Effect
P1 Smooth Continuous output with a prickling sensation Changing of the frequency
P2 Caress A synchronous pulse on both channels which sweeps up and down Adjusting the sweep rate cycle between 0.25 and 20 sec
P3 Swinger An asynchronous pulse on both channels which sweeps up and down Adjusting the sweep rate cycle between 0.25 and 20 sec
P4 Burst Burst of selected intensity and then dropping to zero again. The intensity can only be adjusted during the burst Adjusting the burst rate cycle between 0.25 and 10 sec
P5 Alternate Alternating firing of the channels. The intensity can only be adjusted when the channel is active Adjusting of the alteration rate cycle between 0.25 and 10 sec
P6 Stepper A pulse increasing/ decreasing in three steps. While one channel increases the other decreases. Variation of the pulse frequency
P7 Shooter Channels are shooting alternating pulses Number of pulses per burst can be selected between 1 and 72.
P8 Auto Climb Channel 1: Once intensity is selected, the output drops to zero and starts climbing to the selected level, keeps it for 2 sec, drops to zero and start over.

Channel 2: Continuous output.

Climbing rate per intensity level can be adjusted between 0.05 and 5 sec
P9 Climax The pulse during starts out with a high frequency and low intensity and slows down with higher intensity at the end of the cycle. Cycle rate can be adjusted between 5 sec and 6 ½ min
A1 Channel 1 Modulate Channel 1 fires according to the microphone input Increases sensitivity
A2 Channel 2 Modulate Channel 2 fires according to the microphone input Increases sensitivity
A3 Both Channels Modulte Both Channels fire according to the microphone input Increases sensitivity
L1 Channel 1 Modulate Channel 1 fires according to the line-in input Increases sensitivity
L2 Channel 2 Modulate Channel 2 fires according to the line-in input Increases sensitivity
L3 Both Channels Modulte Both Channels fire according to the line-in input Increases sensitivity

Detail of the Sockets for the Two Channels with the Adaptor to use 3.5mm Leads plugged into Channel 2

The SensaVox is one of the more powerful power boxes out there. While using the same electrodes with other power boxes I have to set their intensity to between 30% and 40% of the max output before the stimulation becomes noticeable. With the SensaVox this was the case already at between 10% and 15%. I especially enjoyed playing mind games with the boost button. It is a great basis for barter games: Either press it as long as the sub agrees to something or leave him the choice of increasing the intensity or feeling the boost. The max output compares to most elaborate power boxes but the low threshold allows for a fine adjustment and varied play.

Detail of the Sticker with the Program Names

Having been on the market for almost 10 years the programs and modification possibilities are not as sophisticated as on a way larger and more expensive ET312b. It does also not feature fancy stereo audio processing or remote control over the internet as the E-Stim System 2b. Still I love the SensaVox very much. It has no full text display which requires pressing multiple buttons at the same time to induce different levels of modification. It is easy to use and thus easy to explain to new top. The programs are fun and cover all the desired sensations. Neither I nor my testee panel really felt it was missing a stimulation pattern.

One thing which puzzled all testee panel member and me were the different audio sockets for the microphone and the line-in. Cheekily we plugged the microphone into the line-in socket and vice versa – and didn’t recognize a difference. So if you ever spotted a difference between the two sockets, please send me an e-mail.

Conclusion: Powerful and easy to use power box with many way to modify the stimulation.
Pro Cons Where to get Price
Powerful and finely adjustable Knobs don’t react when turning quickly ElectraStim 389€
Boost button
Diverse programs
Audio Input
Comes with many accessories for audio play

ElectraStim SensaVox Unboxing

The carrying case in which the ElectaStim SensaVox comes.

After three E-Stim Specials there stream of questions which box is good doesn’t stop. So one box after another I am trying to still your thirst of opinion on the basis of every good e-stim scene. As a nice surprise after a very stressful week at work I got the ElectraStim SensaVox in the mail yesterday.

The interior of the ElectraStim SensaVox carrying case.

It is their top of the line power box. So let’s see what can be found in the black, foam padded plastic case which has a little storage compartment for leads and toys, a battery and the jacket-adapter.

The ElectraStim SensaVox E-Stim Power Box

The SensaVox itself measures 143x78x33mm and weights 200g without a battery. On the top left there is the power soft-touch button, in the middle the rotary control to modify the programs and on the top right the boost button. Below them symmetrically laid out are the rotary controls for the two channels and the display for the intensity setting. Right in the middle of the box the are the two soft-touch buttons for the program selection and the display for the current program is between them.

The ElectraStim SensaVox’s Power Supply with the Adapters for different Socket Systems

The box can either be plugged into the socket. It comes with a power unit with adapters for the four major socket layouts.

The Battery which comes with the ElectraStim SensaVox

If you want to be mobile like on parties, it can also run on battery. So when buy on the run to a play party you can have fun out of the box.

Two 2mm jack to 2mm pin leads

Since it is a dual channel box it comes with two 120cm long 2mm plug to 2mm pin leads.

The Line-In Cable

To fully take advantage of the audio features of the SensaVox it comes with 205cm long 3.5mm jack line-in audio cable with gold plated jacks to connect your MP3 player with the box…

The 3.5mm Female-To-Female Adapter for Enhancing the Line-In Cable’s Length

a 3.5mm female to female adapter if you have you want to use the output of your stereo system and need to enhance the line-in cable length…

The Microphone which can be plugged into the 3.5mm Audio Socket

and finally a microphone to catch the sub’s or surrounding’s noises.

The CD-ROM with E-Stim Audio Tracks and Manuals in multiple Languages

For a first glimpse into the potential of box’s audio features there is a CD-ROM with a few audio tracks to be input into the box. It also contains the manual in French, German, Dutch, Spanish and Italian.

The SensaVox’s Printed Manual

The printed manual only comes in English and is full color. After a short into of how the box works, there are in-depth descriptions of every program and the way they can be modified. If you don’t have the manual with you and are in doubt there is a stick on the back of the box with a program list and a guide for which cable the different sockets around the box are.

The ElectraStim SensaVox with all the Standard Accessories

I can’t wait to spend some quality time with the SensaVox. With extensive audio features and 9 programs it promises to be great fun.

ElectraStim Bi-Polar Soft Genital Clamp

Vendor: ElectraStim

The ElectaStrim Bipolar Soft Grip Clamp

Every time when the E-Stim Special is on one of the most things I get asked about is e-stim on the nipple. But since almost all clamps offered are monopolar I strongly discouraged using them above the waist in order not to interfere with the heart. I got so annoyed with the lack of adequate bipolar clamps that I build some myself with copper electrodes which wasn’t ideal either. So I was very excited when I discovered this clamp by ElectraStim which they sent me to test thoroughly.


As the name of the toy suggests the general design follows the one of a rather large clamp with an overall length of 103mm.

Detail of the 2mm Socket

The bottom half of the clamp are two handles made out of a black polymer connected by a hinge. Below the hinge is the spring which pushes the tips together. The bottom of each handle is a large, slightly domed area for better grip at which bottom the socket for 2mm plugs is located. The top half is made out of flexible yet sturdy wire. The tips are round and slightly domed with a diameter of 12mm. With standard ElectraStim leads attached the maximum aperture of the clamp is 38mm.

Playing with the Bi-Polar Clamp

Despite the little amount of mass and the small contact area the clamps can produce a quite smooth sensation making it a suitable toy for beginners who are not into sharp and stingy pain.

Detail of the Electrode’s Contact Area

As written above this clamp is bipolar so the currency flows between the two tips of each half making it safe to use on the nipples. But through the wide aperture this clamp is quite versatile. Besides the obvious nipples I used the clamps to fry balls or place if in the glans with one electrode on the frenulum to milk and e-stim orgasm out of the subs. The most fun I had was attaching the clamp to body parts otherwise not exposed to e-stim because the sensation is most surprising to the sub. Tormenting the nasal septum with excruciating pain will bring most subs to their knees and ultimately to tears. On the other side of the sensation spectrum a light tingling program on the ear lobes is a great addition to elaborate sensation play.

Maximal Aperture of the Clamp

The stiffness of the spring is relatively low and the tip is smooth and round which makes this clamp comfortable to wear over long periods of time. The downside of this is that if you can to attach the clamp to small body parts like the male nipple, it will slip off very easily, especially when the sub moves around through the induced sensation. I got around this problem by attaching the clamps perpendicularly to the body and put a cloth pin on top of the ElectraStim clamp. It is important to use a cloth pin which is not made out of metal otherwise you will short circuit your power box!  Alternatively wrap an elastic band several times just below the tip of the clamp.

Two Options to Increase the Spring’s Stiffness

It is imperative that when you use a clamp on each nipple that the power box has two completely isolated channels and use one channel per clamp. Otherwise the might be interaction between the two clamps which can lead to currency flowing between the nipples which than ultimately can cause heart problems.

Conclusion: Versatile and safe to use e-stim clamp.
Pro Cons Where to get Price
Bipolar Very low spring stiffness ElectraStim


Wide aperture
Versatile: Enables e-stim on unexpected body areas
  Disclaimer: This toy was sent to me by ElectraStim for an honest and unbiased review.

Flick Duo Power Box

Vendor: ElectraStim

The ElectraStim Flick Duo


The Flick Duo is one of the smallest e-stim power boxes out there. It measures 96x57x16mm. The case is made out of a high quality polymer. The bottom is black with a satinlike feeling while the control panel has a grainy texture and is surrounded by a little bit raised silver frame. The top half of the control panel is symmetrically laid out: There are raised buttons soft buttons with a nice pressure point labeled plus and minus to control the intensity of the two channels. The current selected intensity can be seen on a digital display above the controls. Below the controls are orange LEDs which are on when the channel is firing. Between the two channel controls are four green and one red LED which display the intensity of the kinetic recognized by the power box.  Below this scale there is a digital display which indicates which program is currently selected. The lower half of the control panel has two buttons. The upper one is for cycling through the programs. When the green LED left to it is on you are cycling through the 8 regular programs. When you hold the program selection button for approx. 5 seconds the right LEDs goes on which means you can now cycle through the 4 flick programs. When changing modes please keep in mind that holding down the button will cycle one program further in normal mode until the mode change takes place. The lowest button is the power bottom. Next to it is a red LED which comes on when the battery level is low.

Detail of the Two 2mm Sockets

There are only three sockets on this power box: Two 2mm output sockets for the two channels and a Mini-USB socket at the bottom. If you want to use 3.5mm plug leads ElectraStim offers adaptors for 12€.

The small form factor is partly due to the build in battery which lasts between 4 and 6 hour of play depending on the intensity. This feature was heavily discussed among my testees. Personally I prefer power boxes which uses 9V block batteries (also known as PP3). I usually carry around a bunch of them at an even so when one gets empty I can replace them easily or take a battery out of another box. For the Flick Duo I theoretically have to carry a power bank. But the small form factor was really appreciated by some testees (especially the ones who are not like me and travel with a ton of electrodes) saying it is a very discreet power box which can easily be stored away during public play for example. Once the Flick Duo ran out of power you can use the provided Mini-USB cable to charge it which takes approx. 3h.

The Flick Duo comes in a nice black box along with a detailed manual, two leads, four pad electrodes, a Mini USB charging cable and a drawsting storage bag (For detailed pictures take a look at my unboxing).

Playing with the Flick Duo Power Box

In order to get the box ready to play simply push the power bottom. The box will go through a little self test and then you are ready to play. The box will always start in the first program and with both channels turned down.

Program Number Program Name Sensation
1 Continuous Permanent stimulation from both channels
2 Alternating waves Perpendicularly raising and falling sensation on both channels
3 Escalating Simultaneous Wave Raising and falling sensation on both channels with first increasing and than decreasing speed
4 Alternating Pulse A short burst alternating between the channels
5 Escalating Simultaneous Pulse A pulse on both channels which increases in speed
6 Simultaneous Falling Rest A pulse on both channels with the time between two pulses getting shorter until the stimulation is permanent
7 Alternating Dual Pulses Pulses first slowly alternating between the two channels, than quickly before starting over
8 Rapid Fire Escalation Alternating between both channels the number of pulses increases by one each time until 19 pluses are reached and then starting over again

After pressing the program selection button for 5 seconds you switch into Flick mode which offers you four programs.

Program Number Effect
1 Left output is Flick sensible, the right is permanently on
2 Right output is Flick sensible, the left is permanently on
3 Both channels are flick sensitive
4 One channel is only active. After a certain amount of sensation has been induced on one channel, the other becomes active.

The ElectraStim Flick Duo turned on in normal mode

In Flick mode the box will fire when exposed to up-and-down motion. I would describe the sensitivity as medium. I attached the Flick Duo to my wrist when jerking off and REALLY had to beat the meat in order to feel something. Generally speaking you really have to concentrate in which way to move the box in which intensity to get the desired effect which at least in my case took way too much mental effort to jerk off properly. So instead of a self pleasure enhancer the Flick Duo is a sophisticated pain play tool. Attaching it to the top’s wrist (and the leads along the body which enough slack for him to move around!) when flogging or spanking adds a new dimension and range of sensation to impact play. The Flick mode can also be used a bit like the audio input on other boxes: But instead of putting the mic in front of the sub’s mouth so he has to control himself in order to make the stimulation stop with the Flick Duo the sub has to be tied standing up with the above his head and some degree of being able to move his feet to “work” sensations out. Now hang the Flick Duo from his balls and attach electrodes either to his junk or if you are really evil use pad electrodes on the soles’ of his feet. Kick the dangling box to get it started and watch him jump around trying to cope with the stimulation which inevitably creates more stimulation.

Conclusion: Small e-stim power box with movement triggered stimulation feature.
Pro Cons Where to get Price
Interesting programs Battery not exchangeable ElectraStim


Movement triggered programs Activation of Flick Mode takes rather much movement
Two channels
Small in size
Disclaimer: This toy was sent to me by ElectraStim for an honest and unbiased review.

Prestige ElectraLoops

Vendor: ElectraStim

The ElectraStim Prestige ElectraLoops


The design of the Prestige ElectraLoops is a premium approach towards one of the most essential e-stim toys: The conductive rubber loops. One of the drawbacks of the more basic loops is that the lead’s plug is put directly into the tube. This is not only a bit tricky especially with lubey fingers but if you weren’t careful enough the rubber could tear forcing you to shorten the loop. ElectraStim addressed this issue by attaching extra thick 6.5mm conductive tube to a chocker. The choker is made out of aluminum and comes in classic silver, vibrant cherry red and posh gold. On one side of the choker there is a metal socket for 2mm pin plugs to connect the electrode to your e-stim box. On the other side there is a hole through which the tube runs in order to adjust the length. The usable length of the tube is 21cm. The loose end is close with an aluminum plug in the same color as the choker which prevents the loop to be pulled through the choker. This does not only add a nice bit of color but is a nifty safety feature because it effectively prevents attaching both lead plugs to one monopolar electrode which would short-circuit your powerbox.

The ElectraStim Prestige ElectraLoops are sold in pairs.

Playing with the Prestige ElectraLoop

I consider this toy THE E-Stim essential. If you buy one pair of electrodes for your box, make it this because it is so versatile. The probably most often used play scenario for this toy is CBT: Put a ball stretcher on, lay one loop around the penis root and the other one around the stretched balls and try some different programs. With some training most men can even turn their box with these electrodes into a milker. For this stimulation put one loop either around the penis root or on the bottom of the shaft and the other one right below the glans and select the stroke program. If you do this on a regular basis your dick will most likely learn to reach an orgasm from the currency induced nerve irritation on the frenulum. For faster trainings results I would recommend adding some form of anal set up which stimulates the prostate in the same pattern. But always keep in mind to not overdo the stimulation because especially with electro the nerves of your genitals are easily overwrought. So the stimulation might have a nice torture aspect getting your endorphins flowing but won’t make you come.

Detail of the Aluminum Choker

When playing on the penis I would always recommend putting a TPR stretcher on – like one of the many stretchers and cockrings from Oxballs – because there are easy to handle, are not conducting and will keep the electrodes from touching and thus from short-circuiting. Due to the smooth round edges and since no springs are used to hold the loop in place to risk of catching hair or pinching skin when tightening the loops has been massively reduced. However the design has a bit of a drawback. Especially when you want to put one loop around the base of a big wick with massive and/or stretched balls being able to pull the loose end out of the choker to wrap it around the junk would be great.

But this toy is not limited to CBT. When wearing an isolating glove use the pair as a skin electrode and caress the sub’s skin with it. You can even make an anal electrode out of the pair: Either put one of them into your ass and the other somewhere onto your skin below the waist or put an isolating layer between them – for example a piece of freezer bag which is large enough to keep the electrodes separate even when the electrodes shift a bit – and shove both up your butt in order to create a bi-pole.

Detail of the Aluminum Plug that closes the Loose End of the Conductive Rubber Loop

Maintenance wise this toy is very easy to handle: After having played with it, just wash it in hot water with a bit of detergent in it. Once it’s dried spray or wipe it with a disinfectant. This is especially important when you have used it below your glans because even unnoticed drops of precum can transmit STDs!

Another important play and maintenance aspect to keep in mind is the lube: since the loops are made out of silicone, never use silicone lube on it. On the one hand silicone lube doesn’t conduct currency and on the other hand silicone lube will destroy the silicone of the loops.

Conclusion: Premium version of an e-stim essential.
Pro Cons Where to get Price
Premium materials and design Sometimes a bit hard to handle ElectraStim



Easy to operate even with lubey fingers
Regulation £49.55
Low risk of damaging tube when attaching leads Mr S $74.95
Almost no risk of catching hair of pinching skin
Disclaimer: This toy was sent to me by Uberkinky for an honest and unbiased review.


ElectraStim Flick Duo Unboxing

In just a few weeks the Third Annual E-Stim Special will start on For a couple of weeks it will be all about E-Stim on this website. So one after the other I am slowly getting the toys which I than will be reviewing. ElectraStim is one of the major manufacturers of E-Stim toys and thus I have gotten a lot of questions which of their power box I would recommend. Thus I was very happy when they sent me their Flick Duo along with two electrodes earlier this weekend to put them through my hard testing routine.

The toy comes in a black, sturdy 147x87x90mm cardboard box with the ElectraStim logo embossed in silver. It is wrapped in a trade outer packaging which shows a picture of the box and explains its main features.

Directly below the lid the Flick Duo is housed in a velvety covered tray. The power box features soft-touch push buttons which are symmetrically laid out: In the center there are the power and the mode selection button with the mode number indicator above. On the left and on the right are the intensity controls for the two independent channels. At the top there are two sockets for the two channels, on the bottom there is the Mini USB charging socket.

The Flick Duo comes with a manual in English, French, German, Dutch, Spanish and Italian. It explains the basis of e-stim, how to operate the box, walks you through the 8 programs and 4 flick modi and gives good advice on how to use the electrodes which come with the box. With the manual comes a little card. On one side they advertise for their Jack Socket e-stim enhanced masturbator, on the other side it is described how you can qualify for an additional year of warranty.

Next inside the box there is a small black drawstring back with a silver ElectraStim logo printed on it. It is large enough to hold the Flick Duo, two leads and a pair of conductive loops and some pad electrodes.

Next are the hardware essentials: A Mini USB cable for charging and two 2mm plug to bipolar 2mm pin leads.

Last but not least the Flick Duo comes with four self-adhesive pad electrodes. They are good for a first glance into the e-stim world and allow for out of the box fun.

I am very much looking forward to test this little beast and am especially excited which means things I will be able to do with the flick feature .