SET YOUR OWN LIGHT MODE: Bike tail light with turning signal has 4 light mode options: turn right, turn left, red steady, red flashing or two modes combined. You can switch bicycle lights between different modes according to your needs and different occasions to get the best lighting experience and protect yourself.USB CHARGING METHOD: Our bike rear light turn signal uses a built-in 800mah rechargeable battery, USB charging is convenient and fast, and led bike light can work for about 5 hours under constant brightness. The LED bike turn signals light comes with a charging cable, which can be charged from any of your devices with USB ports, such as laptops, car chargers, mobile phone chargers, power banks, etc.EASY TO INSTALL: Rugged and durable, bike lights rechargeable can be installed and removed without any tools. First fix the rubber strap bracket to the bicycle tube, and then use the rubber band to fix the controller to the handlebar. Lightweight and durable rear bike lights, bicycle turn signals lights can be installed on all bicycles, childrens bicycles, and adult bicycles. Rear bike lights can also be used as a helmet light, backpack light, warning light, etc.WIRELESS REMOTE CONTROL: Smart bike tail light with turn signal is a wireless control system installed on the head of the bicycle. The functions of the rear bike light can be easily controlled via three easy-to-use buttons on the wireless controller to provide additional safety while riding.IPX3 WATERPROOF LEVEL: The led bike lights are made of water resistance material to ensure safe use on rainy days. IPX3 Waterproof level of bike led lights can be used in a humid climate, bicycle tail light is the best partner for outdoor biking, always well for you.