Easy to use, hold power button for 1.5 seconds to turn on or off. 5 modes switchable: Constant, Slow flash, Fast flash, Super fast flash, Breathing flash. Front and rear lights set provides better visibility and safer riding at night. rear light turns off automatically in stationary state for 40 seconds, and turns on when any vibration is sensed. Built-in 400mAh battery is rechargeable from any device with 5V USB output, such as computer, Notebook or power bank.
