The Extender has been designed to be small enough to fit into the pocket of a shirt or attached to a lanyard. It features two USB ports which are electrically isolated to connect to a headset and your computer. When connected the headset should be visible in in all EMOTIV software. It features one button for both power on/off and recording start/stop functionality. A microSD card slot is located on the side to allow users to fit a card to store recordings for offline analysis.