Advanced Design: Built-in 900mAh rechargeable lithium battery in the tail light, CR2032 button battery in the remote control, comes with a charging cable, can be charged from any device with a USB port. Compatible with most electric scooters, bicycles and electric vehicles.Four light modes: The tail light has a remote control switch, you can fix the remote control on the car for convenience when riding. The four modes are the two lights in the middle are always on, the two lights in the middle are flashing, all the lights are flashing, and the two sides are progressively flashing.Easy to install: No wiring required, easy to install, can be clamped in different positions, the maximum clamping opening is 65mm, clamp the taillight where you need it, tighten the screws to complete the installation.Riding Safety: The tail light emits an eye-catching wide-angle beam, which can be seen from several blocks away, don't worry about being knocked down by others, improve visibility, and ensure your safety when riding at night.