6 Working Modes: There are 6 working modes to choose from, including left turn signal, right turn signal, warning light and turn signal. You can adjust different light modes according to your needs to ensure your safety and remind others. Wireless remote control: Install a remote control on the head of the bicycle, easily control the rear light of the bicycle to send signals in different modes via the three easy-to-use buttons on the wireless remote. Easy to Install: With fine tools and rubber ties. Sturdy and durable, it can be installed and removed without tools. First, attach the rubber strap mount to the bicycle tube, then use the rubber band to attach the controller to the handlebar. IPX4 Waterproof: IPX4 waterproof level can be used in light to moderate rain at -4~60C. Your best partner for outdoor cycling. Wide Usage: The turn signal is USB rechargeable and the red light will turn green after fully charged. Suitable for all kinds of bicycles: mountain bike, road bike, mountain bike, racing bike, etc.