This 2.4G remote control for MJ-898 Genie Bike Helmet.Three buttons respectively control the left turn, right turn and front lights. It is designed to be strapped onto the handlebar with the left/right turn signal buttons towards the direction you are facing. Please note that this remote must be paired prior to use and that the helmet main power switch has to be turned on, indicated by working rear taillight, before the helmet will respond to the remote button presses. Battery that is included is CR-2025 which can be replaced by removing the black silicone cover.