It can also be a power bank to charge your bike computer when you need it. With the auto on-off mode, you can use the light conveniently.Make sure you are visible and ride safely with ravemen fr300.Brighter daytime visible warning flashing mode: with the 300 lumens eye-catching warning flashing mode, fr300 will keep you visible in daytime riding 3 constant modes and 3 flashing modes for various riding conditions.Wide-angle lens with side visibility: increase your side visibility when riding through a crossroad or junction.Standard garmin quarter-turn mount: the light can be mounted between the garmin bike mount and computers you can also fix the light at the bottom of garmin flush out-front mount. Adaptors for wahoo computers included: for wahoo computers, replace the top and bottom garmin adaptors with the wahoo one. Note: fr300 does not work with the original wahoo element bolt aero out-front mount usb-c charging & discharging port: charge the light easily or use it as a backup power bank to charge your bike computer usb-c cable and usb-c to micro usb cable included . Warning: do not charge your mobile phone with the light, otherwise it might damage the light and void the warranty. Do not charge or discharge the light when raining.Ipx6 water resistant design: the light is usable when riding in the rain please make sure the cap of the charging port is securely mounted after charging auto on-off mode: hands-free operation so you don't need to worry about turning the light...