1. [WIDE FIELD OF VIEW]180-Degree field of view width, visibility up to 150m, bike tail light bright has 40 of 100LM LED lights, bright enough to be seen from 150m away in foggy/rainy day or even in dark night. super brightness for you but not dazzling 2. [WIRELESS REMOTE CONTROL & 4 Modes]Remote control the turn lights for bicycles to send signals in different modes by the 3 easy to use buttons on the wireless controller. Remote control on handlebar, easy for cyclist to control during riding. Suitable for Mountain, MTB and Road Bicycles. 4 Modes: turn left light, turn right light, red led warning light, SOS 3. [USB RECHARGEABLE] rear bike light use 500mAh Li-on battery, allow the bike taillight usb rechargeable to be fully charge in 2 hours and can work for about 5 hours under constant brightness. Save the time to replace batteries every week. NEVER waste money on batteries again. led bike light comes with a CHARGING CABLE that charges from your computer, power bank or any device with a USB port. Make it the BEST usb bike light on Amazon 4. [IPX2 WATERPROOF] bike brake light IPX2 waterproof function can resist the rainy days and humid climate, waterproof designed for bike outdoor. The equipment for outdoor riding can be used as a Christmas gift for your friends and relatives