Bicycle Rear Light Laser Tail Lamp USB Rechargeable with Wireless Remote Control IPX4 Waterproof Laser Beams and Turn Signals for Bikes Streamlined LED red light : Normal riding = 70 percent on or flashing ; Braking or stopping = 100 percent highlight warning ; Yellow light flashes : Indication of the bike turning left/right Turn left / right when the yellow light flashes, streamlined LED lights from right to left / left to right just like marquee fight Laser light function : On / Flashing : two red poly light spreading on the tail of the bike, identifying the bike is riding in a safety area The ambient light detection function : when the power is at ON state, the light will automatically turn red when riding through a tunnel or in dark night and it will automatically turn off during the day Remote control is fixed in front of the handle bar and tail light receives the signal and turns the direction which is fixed on the rear of the bike