Magicshine Seemee 300 Smart Taillight. Features: OptiTracing feature projects a 360 degree red warning light to ensure all-around visibility Smart motion sensor, automatically increases light level when braking 1600mAh battery lasts a remarkable 200 hours on a single charge lPX6 waterproof rating guarantees continuous operation in the harshest conditions Includes aero seatpost compatible mounting bracket USB-C rechargeable Specs: Model:Seemee 300 Lumens:300 Modes:6 Rechargeable:Yes Color:Black Weight:80g