Red COB LED
Rechargeable Lithium polymer battery(3.7V,400mAh Built-in)
Mirco USB Cable
3 Modes:Steady/ Flashing/Pulsating
Light Mode Memory
20 hours runtime Max.
Low battery,charging and fully charged indicator
Press and hold the switch for 2 seconds to turn off
Recharge time:2 hrs
Auto start and stop: with a intelligent sensor, The bike tail light will turn on automatically riding in low brightness and turn off in high brightness. Also will turn on when braking, automatically switch to brake light mode when decelerating.