The new and improved tES device by Focus with tDCS, tACS, tPCS, tRNS and tRCS waveforms as well as blind and double blind placebo (sham) modes. Easy to use interface consisting of just a simple yet unique 4 way joystick. Built in LCD screen shows device settings. Small and portable, the V3 has a rechargeable battery and includes the necessary accessories to get started with tDCS right out of the box. Grab a Focus V3 to fully customize your neuromodulation sessions. The Focus V3 is CE marked.
The Focus V3 tES device features tDCS (Direct Current), tACS (Alternating Current), tPCS (Pulsed Current), tRNS
(Random Noise) stimulation and an all new tRCS (Rippled Current Stimulation). Inside foc.us V3 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 V3 tES Device
Rippled Current Stimulation
The new foc.us V3 features a rippled current stimulation (tRCS). tRCS is a dynamic tACS. The waveform ripples
after the stimulation frequency as a function of time.
Inside foc.us V3 is a 32Bit ARM® Microprocessor. Using advanced micro-electronics ensures accurate
stimulation. Impedance changes can be detected and correct in 50 µ 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. If you want the best, this is it.
Easy to Use
Getting started with foc.us 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.
Increase Peak Alpha
The dynamic frequencies entrain your brainwaves. The frequency shift then lifts entrained brainwaves higher.
Targetting the occipital lobe for increased visual awareness. See more with focus V3.
Time is Important
It is important not to misuse electrical stimulation through over or repeat usage. That is why the foc.us V3
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
Small But Powerful
foc.us was designed with the aim of being both small and powerful. V3 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.
The focus V3 implements recommended safety guidelines for transcranial stimulation
Focus V3 Available Waveforms - tRCS waveform image coming soon
tDCS - transcranial direct current stimulation
tDCS mode current can be set from 0.1 to 4.0 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
tACS - transcranial alternating current stimulation
tACS mode current can be set from 0 to 4 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.
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 V3 will either show the real current graph or create a
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 today's electrical brain stimulation studies.
Future modes may be added via firmware update
Included in V3 foc.us Starter Kit
foc.us V3 tES Stimulator
USB 2.0 to micro USB Charging Cable
42" 2.5 mm jack X/Y Electrode Connector Cable
X/Y Sponge Holder Electrodes (2)
Focus Rectangular Sponges (2)
Focus Saline Squirt Bottle (Saline Not Included)
Focus V3 Starter Kit Unboxing and Product Demo
Included in foc.us V3 Caputron Ultimate Starter Kit
No. All functionality of the V3 is available via the joystick and LED display. Alternatively, V3 can be
controlled via the foc.us/me Android
Current Regulation in foc.us V3
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 foc.us control the current output in the
foc.us V3. 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 0 mA to
the maximum 4 mA 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 4.1 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 4.1 mA
between the hardware current regulator and the electrodes. In summary, the input to the hardware current
regulator cannot exceed 4.1 mA, which is then shaped into the signal e.g. tdcs, trns, tpcs, tacs at the
desired current level - which is limited to 4 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.
Charging your foc.us V3
Plug the included USB cable into your laptop or phone charging cube. If you do not see the battery icon,
then your device is not charging.
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.
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* 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.
Only 30 minutes of therapy so far but working. Seeing lights not through my eyes is an impressive start. I need "montages for dummies" though.
Well received, thank you for your great quality
Best device for low-frequency tACS therapy
I mainly use V3 as a tACS device and the setting of 0.1 Hz for my insomnia, and it works fine!
Works for me
I was using a tDCS for a year and didn’t notice anything.
I thought I’d try this.
I tried the tPCS setting and i notice I can think more quickly.
it's the best
I'm only concerned about battery life, but more than that, I'm happy with this product.
I don't know about the product until I try it, but it seems that there are no problems and I would like to try a lot from now on.
I am also grateful to the caputron team for their kindness.