Focus V2 tES Device



The Focus V2 is a commercially available tES device that features tDCS (Direct Current), tACS (Alternating Current), tPCS (Pulsed Current) and tRNS (Random Noise) stimulation.

The Focus V2 tES device features tDCS (Direct Current), tACS (Alternating Current), tPCS (Pulsed Current) and tRNS (Random Noise) stimulation. Inside V2 is a 32Bit ARM® Microprocessor. Using advanced micro-electronics ensures accurate stimulation. Impedance changes can be detected and correct in 50 micro seconds. This means target current levels are super-accurate and super-stable. Only the best components were used in construction from such manufacturers as Texas Instruments, Seiko and Panasonic.

Focus V2 tES Device

Easy to Use

Getting started with is simple. The blue OLED digital display and 4-way joystick make light work of controlling your session. During stimulation you can see the exact session time remaining, the active current value in mA plus a real-time graph of the actual current.

Time is Important

It is important not to mis-use electrical stimulation through over or repeat usage. That is why the V2 includes a real time clock. It will warn you if you try to start a stimulation session too soon after your last session. It also times and limits each session to the maximum recommended length of 40 minutes. You can also use the timer to start your session up to 12 hours in the future. This is useful if you want a session to start when you are asleep. All session logs are stamped with the time they were started for your convenience.

Small But Powerful was designed with the aim of being both small and powerful. V2 includes a 3 axis accelerometer. It provides raw data for X, Y and Z movements as well as slope detection, tap sensing, orientation recognition, g-force detection and inactivity sensing. This movement detection is used in the lucid dream program to stop stimulation when movement is detected. Weighing in at less than the battery found in some DIY stimulators yet generating an output 6x higher.

Safety First

    The focus V2 implements recommended safety guidelines for transcranial stimulation
  • CE certified to Medical Standard 60601:2.
  • Over usage prevention system
  • Current limiting circuitry and session audit logs

Recharging Dock

Included with every V2 is the dock. The dock connects to your computer via an included micro-USB cable. As well as recharging your v2 the dock serves as a Bluetooth Low Energy dongle. This allows the connect software to update your v2 via Bluetooth Low Energy without any additional hardware requirements.

Focus V2 tES Device with Charging Dock

Focus V2 Available Waveforms

Focus V2 tDCS Waveform

tDCS - transcranial direct current stimulation

tDCS mode current can be set from 0.1 to 2.0 mA for session durations between 1 and 40 minutes. Voltage can be also be controlled from 10 V to 60 V. Actual current is logged every 50 ms for an accurate record of the session. Featuring current ramp up and ramp down to make session start and end as comfortable as possible.

Focus V2 tACS Waveform

tACS - transcranial alternating current stimulation

tACS mode current can be set from 0 to 2 mA for session durations of between 1 and 40 minutes. Frequency can be set between 0 and 300 Hz in both unipolar and bipolar modes. A current offset between 0 and the target current can also be specified.

Focus V2 tPCS Waveform

tPCS - transcranial pulsed current stimulation

Set the duty cycle and frequency for pulsed current stimulation sessions. You can set Sham to ON, and have no graph, or set sham to BLIND and the focus V2 will either show the real current graph or create a fake graph.

Focus V2 tRNS Waveform

tRNS - transcranial random noise stimulation

Randomize the current, the frequency or both and set the range boundaries for each. tRNS is becoming increasingly popular in todays electrical brain stimulation studies.

What's included

Included in V2 Device Only Kit
  • V2 tES Stimulator
  • charging dock
  • USB 2.0 to micro USB Cable
  • Instruction booklet


Included in V2 Caputron Ultimate Starter Kit


No Dock Connected Error

  1. Is the USB cable connected?
  2. Check you only have 1 instance of connect running, if you have more, only one will be able to access the COM port used by the dock
  3. Check you have the dock drivers installed
More Information

How to install connect

Download connect software here

Walkthrough of installing the software

Do I need an app to control V2?

No. All functionality of the V2 is available via the joystick and oled display.

Current Regulation in V2

Probably the most important function of an electrical stimulator is ensuring that the target current level is correctly maintained. This is an explanation of how control the current output in the V2. There is a hardware current regulator which is controlled by the MCU. The MCU does not participate in current regulation, it just sets the target current value to the current regulator input. The hardware current regulator is very fast. It can change the output current from the minimum 0mA to the maximum 2mA in 300 µ seconds at full impedance load. At lower resistance levels it can do it even faster. The current of the high voltage source is hardware limited to 2.1 mA, which is fed to the hardware current regulator,.which as described above can quickly change the output current to the targeted value and then the final step is an independent hardware current limiter, configured to 2.1 mA between the hardware current regulator and the electrodes. In summary, the input to the hardware current regulator cannot exceed 2.1 mA, which is then shaped into the signal e.g. tdcs, trns, tpcs, tacs at the desired current level - which is limited to 2 mA, and then passed through a final limiter before the electrodes. This provides super fast, super safe signal generation. As part of the assembly process we test and verify that all three of these circuits are functioning correctly. We perform this test on every single device. 100% testing.

How to update the firmware on the V2 using connect

You should regularly update the firmware on your v2 to ensure you have all the latest features. This is how you do that using the connect app

How to install connect on OS X

This is how you install connect on Apple OS X

Charging your V2

If you do not see the battery icon, then your device is not charging. Please ensure you have installed the connect app which will enable charging.

Additional Information

Disclaimer: This product is not a medical device. This product does not claim to diagnose, assist, treat, improve, cure, or prevent any medical condition or ailment whatsoever.

Need to Return Your Purchase? It's Easy - Caputron Offers 90 Day Hassle Free Returns

Our return policy is simple. If you are not 100% satisfied with your purchase from Caputron you can return your item(s) within 90 days of purchase. If 90 days have gone by since your purchase, unfortunately we can’t offer you a refund or exchange.

(Returned devices must be in a new undamaged condition.) Merchandise returned damaged may not qualify for a refund.

Opened or used accessories such as electrodes, gel, saline, head straps, or other consumables are not eligible for a refund.

Packages are generally dispatched within 1-3 days after receipt of payment, though some exceptions may apply, and are shipped via UPS, DHL and USPS with tracking (when applicable) and drop-off without signature. If you prefer delivery by a different method, please contact us. Delivery with signature is available for an additional fee.

Once your order is shipped you will receive an email or sms message when applicabale (additional carrier rates may apply) with any tracking information available -- you can check order status by logging into your account.

International Customers Please Note: Any additional fees required by customs will be the responsibility of the buyer. We cannot control customs processing times in international countries. It is not uncommon for USPS First Class/Flat Rate parcels, or packages of any type, to get caught up in customs for weeks at a time. We highly recommend using UPS or DHL for international orders as they provide faster customs processing times and accurate tracking updates. We are not responsible for any added time due to customs. We will not be liable for, nor will any adjustment, refund, or credit of any kind be given as a result of any delay, misdelivery, or non-delivery. Items returned to us that were deemed undeliverable and are not damaged in any way are subject to partial refund for the cost of the merchandise minus the cost of shipping. At the discretion of both Caputron and the buyer, redelivery may be attempted for additional shipping costs determined prior to reshipment.

* When offered, free shipping is eligible only for the contiguous United States and does not apply to items that need to be shipped freight or for certain research items.

Customer Reviews

Based on 78 reviews
Robert S.
I recieved V3 intead of V2

I find directions difficult to follow.Unable to find phone app

Sorry to hear you received the V3 instead of the V2. A representative will contact you to exchange the device as well as provide clarification on the directions.

horatius h.

Focus V2 tES Device

Ron D.
-- V2 Device Display failure and experience with customer support --

I wrote to / Michael Oxley about a display failure of the V2 device I purchased .. MIchael Oxley told me to send it back to England for repair .. I sent it back and heard nothing from the company .. I wrote Michael Oxley a dozen times and he refused to respond .. I would say that this company is disreputable and offers no repairs on returns and that the product has obvious display problems .. First, you can barely see the display because the grey plastic is to dark .. Then when the device display stops displaying even with a full charge .. I wouldn't trust this company .. I honestly was thinking about the V3 version but not now, not after what has happened ..

Hello Mr. Davis. Thank you for your feedback. It appears you purchased this device directly from Focus and not from Caputron. If you did purchase the device from us we would be able to directly swap the device for you. I just sent you an email privately to offer our assistance.

Luis G.

Good product!

Ivan P.
i have not used the device much

but i am writing this review because customer service is good

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