[Unique Bicycle Taillight Design] The new bicycle taillight has a streamlined design, strong material and small size. The left and right turn signals and the main lights can be disassembled and installed independently, and the turn signals can be installed beside the tires, which can be installed as needed, which is very convenient and practical. [ Wireless remote control and 4 mode selection] Bicycle rear light with turn signal. Thanks to the 4 easy-to-use buttons of the wireless controller, the bicycle tail light can be remotely controlled to send signals in 4 different modes. Including right turn, left turn, flashing main light and double flash warning. The remote control on the handlebar is convenient for the rider to control while riding. [Waterproof Design] The waterproof design allows this bike turn signal to be used in light to moderate rain at a temperature of -4- 140F - your best partner for outdoor riding. Safe mountain bikes for cycling. [USB Charging] Large capacity lithium battery with strong endurance and low power consumption. Our bicycle taillights can last 5-7 hours after a two-hour charge (depending on the working mode). For fast charging, simply connect the bike light to any USB device, such as a power bank, car charger or AC outlet. (Please fully charge the bicycle taillight before using it for the first time.) [Safer] Suitable for all kinds of bicycles: mountain bikes, road bikes, all-terrain vehicles, racing cars, etc. Easily control left and right turn signals, emergency lights and warning lights to ensure safe traffic. Product size: 15cmx5cm. Shipping Quantity: 1 piece.