Specifications BrandROCKBROSModelQ0 QzeroShellPCLensPCLamp BeadsRed LightBracketABSStrapSiliconeBattery LifeAbout 8 63 HoursBuilt in Battery3 7V 250 mAh Polymer BatteryCharging Input5V 2A USB Type C ChargingProduct Weight22g Including Saddle Bracket Features 1 Built in acceleration sensor automatically highlighted when braking2 Leave it to sleep for 30 seconds then vibrate to wake up automatically 3 Intelligent detection of ambient light and independent judgment of turning on the lightPackage includes 1 x Tail Light1 x Saddle Bracket1 x Seat Post Bracket4 x Cable Ties2 x Ties1 x Charging CableNote Due to the different monitor and light effect the actual color of the item might be slightly different from the color showed on the pictures Thank you Please allow 1 2cm measuring deviation due to manual measurement