ElectraStim SensaVox Electro Sex Stimulator - EM140


Expédition calculé à la caisse.

Powerful- use up to 4 accessories at once
99 Intensity Levelswill power even the largest of toys!
Hardcore, industrial looks - a perfect fit for your dungeon aesthetic
9 pre-programmed patterns - each one can be modified to change the speed and pulse width
Audio Control - Mono microphone and line-in modes (3.5mm microphone attachment included)
Mains or battery powered

    ElectraStim SensaVox Electro Sex Stimulator (or EM140) is one of our most advanced and powerful stimulators, jam-packed with tantalising features and packed into a sleek, high-end design. If you want a performance e-stim power box that offers more ways to play then you’ll love this dual-channel electro sex machine.

    Create your own stimulation patterns using music or using voice commands to control the rhythm, intensity and duration of stimulation for a sexual experience that’s truly customisable. The louder the sounds, the stronger stimulation feels. You can also control the stimulation the classic way, with the tactile knob controls that are responsive even in the heat of the moment.

    Independently controlled dual channels within the EM140 e-stim stimulator ballow you to select different intensities to complement any electrode. Use up to 4 uni-polar or 2 bi-polar electro sex toys at once and lose yourself to the thrilling sensations only electro play can provide.

    99 intensity levels make SensaVox our most powerful and responsive stimulator, giving you maximum control over the sensations you feel. As well as the audio-controlled options there are 9 pre-programmed patterns, that can be modified to suit your desires.

    1-year warranty, extendable to 3 years when you register your purchase.

    Note: To ensure you're choosing a Stimulator with ample power for your accessories, we always recommend consulting our Compatibility Table.



    - High-intensity dual channel output with isolated controls
    - 99 intensity settings with twist dial control
    - Boost button to increase stimulation intensity by 25% in a short burst
    - Mains or battery powered with power saving mode
    - 9 pre-programmed stimulation settings
    - Modulate the pre-programmed settings for customised play
    - Voice control using the included microphone
    - Musical control when you connect your music player using the included wire
    - LED display
    - High quality manufacturing and finish


    What's Included?

    • 1x SensaVox Stimulator unit 
    • 1x Hard carry case
    • 2x connecting wires with 2mm pin connection
    • 1x Microphone
    • 1x Line-in cable
    • 1x Female-to-female adapter
    • 1xWorldwide plug adapter
    • 1x 9V battery
    • 1x English instruction booklet
    • Warranty Card 

    How To Use The EM140 SensaVox

    The ElectraStim SensaVox Electrosex Stimulator is one of our most powerful stimulators so it has a lot of functions and features to get to grips with. We’ve created this handy advice guide to give you the full low-down before your purchase arrives.

    A full instructional booklet is also included with the kit.


    SensaVox is a dual-channel stimulation unit designed to be used by individuals or couples for erotic electro stimulation (EES). It can be used during masturbation, foreplay and sex to improve sexual sensations and needs to be used alongside at least 1 bi-polar or 2 uni-polar electrodes. No electrodes are included with the kit, so you will need to buy these separately.

    Because SensaVox has 2 individual channels it can power up to 2 bi-polar or 4 uni-polar electrodes at the same time. Each channel has its own intensity control so you can experience different levels of power on each channel at the same time.

    The stimulator can be powered either directly from the mains or by battery, depending on your preference. Special audio input via a line-in connection or the included microphone allows you to synchronise stimulation with sound, so you can experience sensations in time with music or voice control.

    How Adjustable Is The Control and Intensity?

    SensaVox is a highly adjustable stimulator with 99 intensity levels controlled by a twist dial on each channel. It takes over 4 full rotations of the dials to reach full power, so it’s easy to find the right power setting for you without going too high too fast. This makes SensaVox over 5 times more controllable than most estim devices, ensuring you can find exactly the right intensity setting.

    How Do The Dual Channels Work?

    Having 2 channels lets you use double the amount of electrodes that you can with a single channel unit. Each channel has its own adjustable intensity, so you can use level 99 on channel 1 and level 1 on channel 2 if you like.

    If you like to share sensations with your partner you can use both channels exactly as you would with a single-channel stimulator. Simply connect 2 uni-polar electrodes to the same channel and instead of using both yourself, give one to your partner to play with. When you touch one another you complete the circuit, so you’ll feel sensation through the electrodes but also everywhere you touch one another.

    What Are The Stimulation Programs?

    There are 9 pre-programmed stimulation settings controlled by an embedded microprocessor inside the stimulation unit. The program selection buttons allow you to choose any one of the stimulation programs:

    P1 Smooth – Constant, steady stimulation
    P2 Caress – Pulsating massage
    P3 Swinger – Pulsating massage alternates between channels
    P4 Burst – Stimulation is simultaneously interrupted on both channels in burst
    P5 Alternate – Stimulation alternates between both channels
    P6 Stepper – Stimulation fades in and out on each channel at alternate times
    P7 Shooter – Strings of pulsating sensations alternate between the channels
    P8 Auto Climb – Channel 1 slowly builds intensity, Channel 2 stimulates continuously
    P9 Climax – Pulsations start slowly, quicken and then slow again


    Can I Select Different Stimulation Patterns On Each Channel?

    No. The selected pattern will operate on both channels with the exception of P8 (which will have a pattern on channel 1 and constant stimulation on channel 2).

    Do The Channels Stimulate At The Same Time?

    On some pattern settings you’ll feel stimulation at the same time across both channels. Other patterns alternate between the channels, so it feels as if stimulation is flicking between the channels. We’ve added a safety feature that prevents you increasing the stimulation level on either channel when sensations are not active. This ensures you won’t be in for any surprises when stimulation resumes on that channel.

    What Is The Boost Feature?

    Pressing the boost button will temporarily increase the output intensity by 25% across both channels. You could use Boost at the point of climax to make your orgasm feel stronger or alternatively use it during sensory play to test your partner’s limits. The increased intensity only lasts for a couple of seconds after the button is pressed, or for as long as the button is held down. Intensity will then return to the original power level.



    About The Audio and Microphone Input:

    You can use either music or voice control to create stimulation patterns with SensaVox. Simply connect SensaVox to your amplifier, speakers, MP3 player or other audio connection using the audio cable or by plugging the included microphone into the input socket on the stimulator. Specialist audio files are available from our Audio Stimulation page.

    The intensity displays will automatically reduce to 0 when either of the audio modes are invoked and the program display will change to indicate which mode you are using. The stimulator has an intelligent internal processor that will immediately recognise the audio input.

    The display will show A1 when the microphone is plugged in and L1 when you connect to a music device. To return to the built-in programs simply remove the audio connector and you will be reverted to the last selected program. Always begin audio modes with a low intensity setting and slowly increase power as you adjust to the voice/music activated stimulation.


    Plug the microphone into the input socket on the stimulator and use the pattern button to select your choice of stimulation. There are 3 different audio options to choose between:

    A1 – Channel 1 is controlled by the sound the microphone picks up
    A2 – Channel 2 is controlled by the sound the microphone picks up
    A3 – Both channels are controlled by the sound the microphone picks up

    When using A1 or A2 the other channel will be set to stimulate continuously.

    Twist the dials to adjust how sensitive stimulation is to sound. The more levels you climb, the more stimulation will react to changes in sound. The intensity is controlled by volume so the louder you speak into the microphone, the stronger stimulation will feel.

    The microphone sensitivity is set to filter out unwanted peripheral sounds, so for the best results you should speak directly into the microphone. If you need to extend the distance of the mic from the stimulator you can do so using the included adaptor and the audio cable. If you’d like the microphone to be more sensitive you can remove the microphone cover.


    Plug the audio cable into the stimulator and the unit will switch to L1 mode. This allows you to use any audio device to create tailored stimulation. Simply plug the other end of the audio cable directly into your phone, MP3 player, computer or hi-fi. If you want to be able to hear the music while it stimulates, you’ll need to buy an adaptor that splits a single male input into 2 female outputs. This will allow you to connect both the stimulator and speakers to the same 3.5mm jack.

    Once you have your stimulator connected, you can explore 3 different settings:

    L1 – Channel 1 is controlled by the audio input
    L2 – Channel 2 is controlled by the audio input
    L3 – Both channels are controlled by the audio input

    When using L1 or L2 the other channel will be set to continuous stimulation.

    Just like with the microphone input, the audio input sensitivity can be adjusted using the twist dials. The more you twist the dials, the more the stimulator will react to the audio input. To increase the intensity of stimulation you need to increase the volume, but always start off low.


    Economy Power Saving Feature:

    When powered by the mains, the stimulators LED displays will be at full brightness and constantly illuminated. When running on batteries the displays will be slightly dimmer and will automatically extinguish 15 seconds after the last adjustment was made. This helps to prolong battery life so you can play for longer. If you’d like to switch off the power saving mode, simply hold down the boost button as you switch the unit on.

    Safety Features:

    Utilising digital technology allows us to include some very useful safety features. When you switch on the ElectraStim Em140 all power levels will automatically be set to 0. Similarly when a different program is selected the stimulation intensity levels on both channels are automatically reduced to 0. The output intensity is also reduced to 0 when the either of the SensaVox audio modes are invoked.

    On programs where stimulation alternates between channel 1 and channel 2 it is only possible to increase the intensity of a chosen channel when its output is active. This avoids unpleasant surprises when the channel becomes active again. The intensity can be reduced whether the channel is active or not.

    Low Battery Warning

    A low battery light will illuminate when the battery is starting to run out, so you can switch to mains power or replace the battery at your convenience. The display will also flash the message ‘Lo’ intermittently as a warning.



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    Customer Reviews

    Based on 7 reviews
    Trevor N
    ElectraStim SensaVox Electro Sex Stimulator - EM140

    I only purchased this device very recently, so it's early days yet, but I think I now know enough to write this review. I notice that on the unit itself, it is described as a novelty item. Overall, I'm not unhappy with it, but already some of the novelty is beginning to wear off. I've tried more than once the feature which uses a microphone to influence the output of the device. Basically, I couldn't get that feature to work. Even with the sound source set at full volume and the controls of the unit cranked up to max, I could barely detect any impulses at all. I got a similar result when I used the supplied audio input cable. Perhaps I was trying to use the microphone or audio inputs with the wrong accessory. I'll try it again with other accessories when I get them. The other programs and features, which don't require a microphone audio input, all seem to work more or less as described. I do like the fact that it's designed with safety in mind. I think that's important because surely no one wants a nasty unexpected shock because they pressed the wrong button.

    Kieran R
    ElectraStim SensaVox Electro Sex Stimulator - EM140

    Am very impressed with the array of programmes experienced so far and the scope for creativity included in the unit, so is my partner btw and once I plug it into my music studio the rhythms will roll, well pulse lol. Well built, excellent packaging, looking forward to many shocking but happy hours of fun using it.

    ElectraStim SensaVox Electro Sex Stimulator - EM140

    I've had this power box for over 5 years and is an integral part of my play space setup. I contacted customer support to see if they could check my unit as it had developed a minor fault! Clair was amazing and the team re conditioned my unit and not only sent it back to me fixed but included a UK adaptor for the power supply! (All out of warranty) Thanks ElectraStim for making an old Sadist very happy!

    Jacky C
    ElectraStim SensaVox Electro Sex Stimulator - EM140

    I first tested the SensaVox back in 2012 and had been wanting to get one since then. I finally did 10 years later, and while the unit feels dated compared to the latest models, it does what it is intended to do, to expectation, and satisfaction. The one thing that trumps it over the newer models is the Boost button. Time it right and let the sparks fly! My only gripe is that the package includes everything but sticky pads. Come on, those are the cheapest items in the store and you can't even include one in the box?!

    Michael Allan
    I'm excited!

    I love the ElectraStim SensaVox EM140 E-Stim Stimulator, it has Mains or battery powered. With the Mains power there is power plus and don't have to wait for a recharge, just plug it in and cum again and again and again . . .