Driving Safety: When cycling with the turn signals, you can use the remote control to control this smart tail light with turn signal, to give vehicles driving backwards turn signal indications,including left and right steering, parking and brake warnings. 2-in-1 Design: Can be used as both tail light (flashing/continuous) and turn signal (left/right). With three settings, clear LED arrows light up to indicate left, right and danger which is perfect foryour driving in complete safety. Functional: High quality remote control LED directional light is used for nighttime use, such as cycling, baby carriage, jogging, walking, road emergency and camping. Its directional flashingindicates that the safety factor of night travel is greatly improved. Remote control: Signal Pad is a wireless control system, installed on the head of the bicycle, allowing easy control of the operation of the rear light for increased safety during cycling. IPX2 Waterproof: IPX2 Waterproof function withstands rainy days and humid climate. It is designed for outdoor cycling. Requires 2 AAA batteries Note: This product does not contain batteries, you need to prepare Use the screwdriver in the package to loosen the screws and remove the back plate to install the battery. A key switch There is a white round switch on the back of the taillight, you can turn the light on or off by pressing firmly. Turn off the main switch when not in use to save battery power. Easy Setup No other tools are needed for installation, just use the straps to secure the light and remote to the pole.