3 in 1 USB Rechargeable LED Bicycle Wireless Remote Control Turn Signal Taillight Cycling Equipment 30lm 5 Modes Waterproof Mountain Bike Safety Night Riding Warning Rear Lamp Feature: 1. 3-stage detachable design: it can be used separately or in combination; 2. Turn signal: It can remind the vehicle behind you that you are about to change position; 3. Charging display: the indicator light is red when charging, and the indicator light is green when fully charged; 4. Waterproof. Specification: Main body material: ABS Product size: about 129x48x15mm Product net weight: about 110g (weight of tail light + remote control) 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) Usage time: 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: 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.