MEROCA WR15 Bicycle Taillight USB Charging Intelligent Sensor Brake Lights for Mountain and Road Bikes MTB Bicycle Accessories Integrated brake sensing technology COB LED Full 6061 aluminum alloy chassis Automatically turns on/off based on light intensity and motion Automatically switches to sleep mode to save power Two types of mounting kits available (cushion mount / seat tube mount) 6 flash modes 500mAh Li-ion rechargeable battery Longer usage time, 30% higher than the previous model, up to 32 hours (slow flash mode) USB charging Charge status indicator Compact and lightweight design (48g) IPX6 waterproof Auto/Manual mode switch Note: Manual mode requires manually turning the light on/off Specifications: Auto/Manual mode switch Note: Manual mode requires manually turning the light on/off Working principle Manual mode: manual control switch with brake sensing function Auto mode: light sensor, vibration sensor, brake sensor. In automatic mode, the tail light is off but brake sensing function remains active Package Included: Taillight x 1 USB cable x 1 Bracket x 1 Notes: Please check the detailed size/model information before purchasing Due to differences in monitors and lighting effects, the actual color of the item may vary slightly from the images shown Please allow 12 cm measurement deviation due to manual measurement