With USB interface, the bicycle light can not only be used as a lighting light, but also supports charging of devices, such as computers, car chargers, USB-socket and power-bank, etc. Designed to be , so it fits easily in your pocket or car bag Tail light emits an eye-catching wide-angle beam that can be seen from blocks , so you don't have to worry about being knocked over by others It is constructed of plastic material, which is waterproof, wear-resistant and durable. Suitable for most bicycles such as mountain bikes, road bikes, folding bikes, etc. Turn signal: It can remind the vehicle behind you that you are about to change position; Charging display: the indicator light is red when charging, and the indicator light is green when fully ; 3-stage detachable design: it can be used separately or in combination; Other parameters: Lamp beads: 30*yellow LED+8*red LED Brightness: 30LM Lighting gear: 5 gears, yellow light strong light - red light strong light - all lights flashing - left turn signal - right turn signal Battery: Built-in polymer lithium battery (600mAh) Battery life: about 5H Troubleshooting: If the tail lamp is received and the side lamp does not illuminate, it is probably in standby mode, so you need to press the remote control once. Note: Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Because this remote control has a special structure, it cannot be equipped with an insulating sheet; if the remote control does not work after receiving the goods, you can check whether the button battery of the remote control is exhausted. Colour:black Material:plastic Package Contents: 1 x Bicycle Taillight 1 x remote control Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.