Adopted with advanced wireless remote technique, the Rear Bike Light dedicates to bike tail light which allows you to easily control your taillight while riding at night. Smart Rear Bike Lights Laser Tail Lamps for Bicycle Remote Rechargeable Wireless A perfect combination of warning lights direction indicator and direction indicator, makes night riding safer more. With rechargeable Li-Polymer battery, one single charger can work for 10 hours continuously. One CR2032 battery for remote control, which can work for three months long. Equipped with Micro USB port, universal with the Android cable. This rear bike light is shockproof and waterproof, which performs well under any weather conditions. Easy to install, you can install the rear bike light successfully with the screw and bracket provided, no other tools are needed. All the signals are displayed by the dot matrix display, like turning, warning or etc. Specifications Name Smart Rear Bike Lights Laser Tail Lamps for Bicycle Remote Rechargeable Wireless Material ABS LED Quantity 64 Laser Beam 2 Light Power 3.7V 650mAh USB Battery Remote Control Battery 1 x CR2032 Battery Waterproof Grade IP x 5 Package Included 1 x Rear Bike Light 1 x Wireless Remote (Including Battery) 1 x USB Cable 1 x Holder. How to Use 1. Long press host one second to switch on (all the lights flash three times), and long press host one second again to switch off (all the lights flash one time).The left red light is flashing switch on, long press 3 seconds to Match Code (host showed C). Then press the any key of the remote controller to finish the setting. 2.Upward the turn light-switch to left (the left light is flashing),downward the turn light-switch to Right(the right light is flashing) 3. Short press the right button of remote control, cool graphics tall light will switch on/off (blue light flash in the middle). 4. Short press the left button of remote control, laser parallel line will switch on/OFF. 5. All the lights of host will lighten on when brake the bicycle. 6. When the left light of host is continuous lighting, it means the low batter and need to recharge. The right light will turn on when recharging the battery, and the green light will turn on when fully charged.