Kryptonite Alley F-800 Headlight Rechargeable

6 modes including Daytime/Night time Pulse for greater visibility High steady = 800 lumens for 1.5 hrs runtime; run at 400 lumens for 3 hrs runtime Fully USB rechargeable - no batteries to buy or replace Power saving function- 10% power or less, lights will automatically switch to lowest lumen output Memory function turns light on at the last mode it was turned off