5 Modes & Wireless Remote Control: Switch 5 lighting modes through the wireless remote control, turn left (yellow light) / turn right (yellow light) / constant red light / flashing red light / flashing red + yellow light, and no need to wave your hand to send a signal. Brightness High brightness: The taillights have 20 built-in high-brightness red and yellow lamp beads, and the wide-angle beam emitted is very eye-catching, which effectively improves the safety of night riding. USB-C rechargeable: Bike taillight built-in USB rechargeable battery, which can be used for about 10 hours after charging for 3 hours, providing assistance for your long-term riding. The wireless remote control needs to use the CR2032 battery (the package contains the battery). Easy Easy to install: Convenient one-touch removal button, you just need to slide the lights in or out of the bracket, without removing the entire bracket. With waterproof function, whether you are running, walking the dog, cycling, skateboarding or hiking, these warning lights can provide you with protection.