Front and rear lights set provides better visibility and safer riding at night.;easy to use, hold button for 1.5 seconds to turn on or off.;5 modes switchable: constant, slow flash, fast flash, super fast flash, breathing flash.; 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 computer, or bank.;4-in-1 charging cable allows 4 lights to charge at same time.;made of high-strength aluminum alloy and pc material, ipx6 waterproof and durable.
