The Avenue R-50 COB light features 50 lumens with side illumination ports to allow you to be seen when riding across traffic lanes, and handy features such as memory function which turns the light on at the last mode it was turned off. Features: 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-lights turn on at the last mode it was turned off Built in battery indicators Run time: 2.25 hours (High Flash Mode) 2.25 hours (Medium Steady Mode) 5 hours (Low Steady Mode) 4.5 hours (Daytime Pulse Mode) 5 hours (Nighttime Pulse Mode) 11.25 hours (Economic Flash Mode) Specifications: Brightness: 50 Lumens Battery Type: Rechargeable (USB) Run Time: 2.25 - 11.25 Hours Beam Color: Red Color: Black Weight: -