Ultra-bright bike turn signals: 39 high-brightness LED bulbs, up to 100 lumens output, bright enough to be seen from 150 feet away on a foggy/rainy day or even in the dark night. Waterproof:Life waterproof , to ensure normal daily use - your best partner for outdoor cycling. Wireless remote control: Install a remote control on the front of the bike, easily control the bike taillight to send different signals with the three easy-to-use buttons on the wireless controller. Many possible uses: Suitable for all types of bikes: mountain bike, road bike, touring bike, racing bike, etc. Easy to control: right/left turn signals, emergency and warning light, for your safety in traffic. USB rechargeable: Built-in large capacity rechargeable battery, durable and environmentally friendly. Can be adapted to a variety of charging methods, such as laptops, car chargers, mobile phone chargers, power banks, etc. Package Contents: Lights bike rear*1 Warm advice: Dear buyer, due to lighting effect, monitor's brightness, manual measurement etc, there may be some slight differences in the color and size between the photo and the actual product. Sincerely hope you can understand! Thank you!