# Specifications

The EMOTIV Extender is compatible with our latest headsets (Insight, Flex and EPOC+) and is designed to enhance the headset usability by providing longer battery life and data storage. It has four functions:

1. Extends the battery life of the headset.
2. Allows tethering of the headset to your computer. The tether is isolated to provide a safe, reliable connection while minimising the injected noise.
3. Allows a user to record their sessions to a microSD card for later playback and analysis, removing the need to record to a mobile device or PC.
4. Allows an external hardware trigger to inject marker data directly into the raw data stream, improving accuracy of marked events to +/- 1 sample. 

|                                 | **Extender**              |
| ------------------------------- | ------------------------- |
| Connectivity - PC               | USB - Mini B              |
| Connectivity - Headset          | USB - A                   |
| Insulation                      | 2.5kV                     |
| Trigger Input                   | Opto-isolated >2.5V pulse |
| Trigger Minimum pulse           | 100us                     |
| Trigger Edge                    | Rising                    |
| Battery Capacity.               | LiPo battery 1850mAh      |
| Battery life (standby) 70% full | 1 year                    |
| Battery life (SD mode)          | 10 hours                  |
| Battery life (tethered)         | Unlimited                 |
| Battery life (Power Only)       | 7 hours                   |
| Charging Time (1A)              | 2 hours                   |
| SD Card Format                  | FAT32                     |
| SD Card Max Capacity            | 32GB                      |
| SD Card use                     | 8KB/s                     |