The Alley F-650/Avenue R-50 COB light combo includes a 650 lumen front light with a 50 lumen rear light. Both lights feature 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: Avenue F-650 modes include high steady, medium steady, low steady, daytime pulse, nighttime pulse and economic flash Avenue R-50 COB modes include high flash, medium steady, low steady, daytime pulse, night time pulse and economic flash Fully USB rechargeable - no batteries to buy or replace Run time 2 to 26 hours for the Street F-650 WITH 6 light modes and 2.25 to 11.25 hours for the Avenue R-50 COB with 6 modes 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 Specifications: Brightness: 650 Lumens (Front), 50 Lumens (Rear) Battery Type: Rechargeable (USB) Run Time: 2 - 26 Hours (Front), 2.25 - 11.25 Hours (Rear) Beam Color: White, Red Color: Black Weight: -