FR300 is a highly visible daytime running headlight to help you ride safely. It gives out 300 lumens in the warning flashing mode and works with Garmin/Wahoo/Bryton computer mounts to keep your handlebar clean. It can also be a power bank to charge your bike computer when in need. With the auto on-off mode, you can use the light conveniently. Make sure you are visible and ride safely with RAVEMEN FR300.A tether is recommended to secure your computer to the handlebar