# Technical Specifications

| Headset Version                               | EPOC v1.0                                                                         | EPOC+ v1.1                                                                                                           | EPOC+ V1.1A                                                                                                          |
| --------------------------------------------- | --------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------- |
| Number of Channels                            | 14 (plus CMS/DRL references, P3/P4 locations)                                     | 14 (plus CMS/DRL references, P3/P4 locations)                                                                        | 14 (plus CMS/DRL references, P3/P4 locations)                                                                        |
| Channel names (International 10-20 locations) | AF3, F7, F3, FC5, T7, P7, O1, O2, P8, T8, FC6, F4, F8, AF4                        | AF3, F7, F3, FC5, T7, P7, O1, O2, P8, T8, FC6, F4, F8, AF4                                                           | AF3, F7, F3, FC5, T7, P7, O1, O2, P8, T8, FC6, F4, F8, AF4                                                           |
| Sampling Method                               | Sequential sampling. Single ADC                                                   | Sequential sampling. Single ADC                                                                                      | Sequential sampling. Single ADC                                                                                      |
| Sampling Rate                                 | 128 SPS (2048 Hz internal)                                                        | 128 SPS / 256 SPS (2048 Hz internal)                                                                                 | 128 SPS / 256 SPS (2048 Hz internal)                                                                                 |
| EEG Resolution                                | 14 bits 1 LSB = 0.51μV (16 bit ADC, 2 bits instrumental noise floor is discarded) | 14 bits 1 LSB = 0.51μV (16 bit ADC, 2 bits instrumental noise floor is discarded), settings can be changed to 16-bit | 14 bits 1 LSB = 0.51μV (16 bit ADC, 2 bits instrumental noise floor is discarded), settings can be changed to 16-bit |
| Bandwidth                                     | 0.2 - 45Hz, digital notch filters at 50Hz and 60Hz                                | 0.2 - 45Hz, digital notch filters at 50Hz and 60Hz                                                                   | 0.2 - 45Hz, digital notch filters at 50Hz and 60Hz                                                                   |
| Filtering                                     | Built-in digital 5th order Sinc filter                                            | Built-in digital 5th order Sinc filter                                                                               | Built-in digital 5th order Sinc filter                                                                               |
| Dynamic Range (input referred)                | 8400 uV(pp)                                                                       | 8400 uV(pp)                                                                                                          | 8400 uV(pp)                                                                                                          |
| Coupling Mode                                 | AC coupled                                                                        | AC coupled                                                                                                           | AC coupled                                                                                                           |
| Connectivity                                  | Proprietary 2.4GHz wireless                                                       | Proprietary 2.4GHz wireless, BLE and USB (Extender only)                                                             | Proprietary 2.4GHz wireless, BLE and USB (Extender only)                                                             |
| Battery Capacity                              | LiPo battery 680mAh                                                               | LiPo battery 680mAh                                                                                                  | LiPo battery 680mAh                                                                                                  |
| Battery Life (typical)                        | 12 hours                                                                          | 12 hours                                                                                                             | 12 hours                                                                                                             |
| Impedance Measurement                         | Real-time contact quality using patented system                                   | Real-time contact quality using patented system                                                                      | Real-time contact quality using patented system                                                                      |
| IMU Part                                      | IDG500                                                                            | LSM9DS0                                                                                                              | ICM-20948                                                                                                            |
| Accelerometer                                 | -                                                                                 | 3-axis +/-8g                                                                                                         | 3-axis +/-4g                                                                                                         |
| Gyroscope                                     | 2-axis +/-8g                                                                      | 3-axis +/- 500 dps                                                                                                   | Interpreted as Quaternion                                                                                            |
| Magnetometer                                  | -                                                                                 | 3-axis +/- 12 gauss                                                                                                  | 3-axis +/- 4900 uTesla                                                                                               |
| Motion Sampling                               | 128 Hz                                                                            | 32 / 64 / 128 Hz (User Defined)                                                                                      | 32 / 64  Hz                                                                                                          |
| Motion Resolution                             | 10 bit                                                                            | 14 / 16-bit (User Defined)                                                                                           | 14 / 16-bit (User Defined)                                                                                           |
| Quanterion                                    | No                                                                                | No                                                                                                                   | Yes                                                                                                                  |
| Sensor Material                               | Ag/AgCl + Felt + Saline                                                           | Ag/AgCl + Felt + Saline                                                                                              | Ag/AgCl + Felt + Saline                                                                                              |