# Technical Specifications

| Device                         | EPOC Flex                                                                                                                                                                                                                                            |
| ------------------------------ | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| No. of Channels                | 32 (plus CMS/DRL references)                                                                                                                                                                                                                         |
| Channel names                  | Configurable on standard 72 channel international 10-20 locations.                                                                                                                                                                                   |
| Sampling method                | Sequential sampling. Single ADC                                                                                                                                                                                                                      |
| Sampling rate                  | 128 SPS (1024 Hz internal)                                                                                                                                                                                                                           |
| EEG Resolution                 | 14 bits 1 LSB = 0.51μV (16 bit ADC, 2 bits instrumental noise floor discarded)                                                                                                                                                                       |
| Max Slew Rate                  | 32.64uV/sample (Compression required for BLE data transmission)                                                                                                                                                                                      |
| Bandwidth                      | 0.2 - 45Hz, high attenuation at 50Hz and 60Hz                                                                                                                                                                                                        |
| Filtering                      | Built in digital 5th order Sinc filter                                                                                                                                                                                                               |
| Dynamic range (input referred) | +/- 4.12 mV                                                                                                                                                                                                                                          |
| Coupling mode                  | AC coupled                                                                                                                                                                                                                                           |
| Connectivity                   | Proprietary 2.4GHz wireless, BLE(coming soon)                                                                                                                                                                                                        |
| Battery Capacity.              | LiPo battery 595mAh                                                                                                                                                                                                                                  |
| Battery life (typical)         | 6-9 hours                                                                                                                                                                                                                                            |
| Impedance Measurement          | Real-time contact quality using patented system                                                                                                                                                                                                      |
| IMU Part                       | ICM-20948 3-axis Accelerometer, 3-axis Gyroscope, 3-axis Magnetometer. Data Output 10 channels Quaternions, (Q0, Q1, Q2,Q3), Acceleration (X,Y,Z) and Magnetometer (X,Y,Z)                                                                           |
| Motion Sampling                | 16 Hz                                                                                                                                                                                                                                                |
| Motion Resolution              | 8-bit Output                                                                                                                                                                                                                                         |
| Sensor Material                | <p>Sintered Ag/AgCl (EPOC Flex Gel model) can be used with any EEG gel</p><p>Electroplated Ag/AgCl (EPOC Flex Saline models) with replaceable polyester felt pads that can be sterilised and re-used (bulk pack available for separate purchase)</p> |