OVERVIEW
tES4me is a portable 8-channel device for non-invasive transcranial electrical stimulation (tES) of the human brain.
During a session, the device delivers weak constant or pulsed electrical signals through surface electrodes.
TES4me supports multiple stimulation modes (tDCS, tACS, tRNS, tPCS, ACM), offers flexible parameter adjustment, and stores a complete history of sessions.
The system can be used both in research projects and in conditions of independent operation:
- an operator pre-programs the stimulation course,
- the user performs sessions according to the predefined schedule.
Key features:
- 8 independent channels;
- adjustable current range: 10–4000 µA;
- supported waveforms: harmonic, white noise, pulsed, sin(x)/x, Gaussian, etc.;
- smooth ramp-up and sham stimulation modes;
- electrode connection check and current density limitation;
- up to 8 hours of autonomous operation;
- lightweight housing — less than 65 g.
SOFTWARE
The TES4me system is operated via mobile and desktop applications for iOS, Android, and Windows.
Tes4me Doctor — the operator’s application. It allows creating and recording stimulation courses, using built-in or custom templates, storing user data, and synchronizing session history with the stimulator.
Tes4me — the user’s application. It displays the current device status, schedule, and session history, monitors electrode connection quality (impedance), shows the progress of the procedure, and enables self-assessment after stimulation.
The stimulator’s embedded software stores parameters and session history, ensures electrode connection control, and automatically transfers data to the applications.
SPECIFICATION
| Channels | 8 |
| Max current | 4 mA |
| Stimulation current modes | Direct current (DC) (default), Alternating current (AC), Alternating current monopolar (ACM) |
| Shape (for AC and AC monopolar current) | Sine, Random, Square, Ramp, Trap, Sin(X)/X, Gauss |
| Repetition of periods of current waveforms for modes AC, ACM | Continuously, BlockPause |
| DDS generator frequency / bit width | 8 kHz / 13 bit |
| Operating resistance range | Impedance – less than 8 kΩ |
| Checking the electrode connection before stimulation | Yes |
| Lower cutoff frequency at the level of ‑3 dB (for Random) | from 10 to 500 Hz (set programmatically) |
| Upper cutoff frequency at the level of ‑3 dB (for Random) | from 50 to 1000 Hz (set programmatically) |
| Wireless | BLE 4.2 |
| Power | Built-in battery |
| Check of battery status | Yes. Hardware. Intelligent based on counting charge current / discharge current / time and storage temperature |
| Battery charge | ≤ 2.5 hours from + 5V USB, 500 mA or 2 A |
| Material of electrode conductive surface | Low Corrosion Stainless Steel AISI 316 |
| Surface area of contact of the electrode substance with the skin | 380 mm2 |
| Time of continuous work | not less than 8 hours |
| Dimensions (LxWxH) | 87 x 56 x 17 ±1 mm |
| Net weight | < 65 g |
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