Description:Ingratiated brake sensing techniques.COB LED.Full 6061 Aluminium alloy chassis.Automatically turn on/off depending on the light intensity and motion.Automatically switch to sleep mode to save power.Two types of mounting kits can buy (cushion mounting / seat tube mounting).6 flash modes.500mAh Li-ion re-chargeable battery.Longer use time, 30% higher than the old model ,up to 32H. (slow flash mode)USB charging.Charge stage indicate.Compact and Light weight design (48g).IPx6 Water proof.Auto/Manual mode switch*.Note: *Manual mode need to switch on/off the light manually.Specifications:Auto/Manual mode switch*.Note: *Manual mode need to switch on/off the light manually.Working principleManual mode: manual control switch with brake sensing function;Auto mode: light sensor, vibration sensor, brake sensor. In automatic mode,the tail light is off and there is still a brake sensing function.Package Included:taillight*1USB cable*1Bracket*1