Specifications ModelROCKBROS Q5TypeType C ChargingModes4WaterproofIPX6MaterialAluminum AlloyOutput60 LumenBattery400mAh Li ion rechargeable batteryInstall MethodSaddle SeatpostWeightApprox 55g including holder Size40 34 34 mmFeatures 1 Full 6061 Aluminium alloy chassis 2 Automatically turn on off depending on the light intensity and motion 3 Automatically switch to sleep mode to save power 4 Seat rail mounting5 4 flash modes 6 20hrs run time 7 400mAh Li ion rechargeable battery 8 Type C charging 9 Battery indicator flashes every 6 seconds 10 Compact and Lightweight design 55g 11 IPx6 Waterproof Package includes 1 x Tail Light1 x Charging Cable