High-Performance: This premium mountain bike light delivers up to 2,000 lumens max. output and a runtime of up to 89 hours with a bright hotspot and wide spill. The 100-lumen low mode can help ensure safety by warning trail traffic of your presence when stopped on or near the trail. Fast Charging and Recharging: Powered by a 14.4V 64.8Wh 21700 battery pack with a USB Type-C port, it supports 18W fast charging and discharging, so it can serve as a convenient mobile power bank. Great Compatibility: The light head is compatible with GoPro(TM) mounts, so it easily mounts to handlebars, helmets, tripods, and more. Convenient Oversized Switch Button: The entire upper cover of the light head is a large switch button, so it can be easily operated with your riding gloves on.