This bicycle taillight has ABS wear resistant housing, the beautiful and stylish appearance makes it well coordinated with all kinds of bikes. Wireless remotely control, easier to operate, support to switch the light mode, control the tail light left and right rotation, to alert approaching vehicles, and ensure your safety. 5 modes design, you can easily switch easily according to your needs. Tail light can be adjusted up and down at a wide angle for a safer viewing angle. IPX4 waterproof design, multiple installation ways, to meet your different needs and ensuring safety at night. Features: ABS wear resistant housing, the beautiful and stylish appearance makes it well coordinated with all kinds of bikes. Quality LED light beads, 50 lumens brightness, suitable for using in dim light environment. 5 modes design, support left turn signal, right turn signal, red light keep on, red light quick flash, red light slow flash, you can easily switch easily according to your needs. Wireless remotely control, easier to operate, support to switch the light mode, control the tail light left and right rotation, to alert approaching vehicles, and ensure your safety. The tail light can be adjusted up and down at a wide angle for a safer viewing angle. IPX4 waterproof design, ensures safety riding on complex environment for cyclist, it can not to be immersed in rainwater for long periods of time. Built-in 500mAh rechargeable lithium battery, support multiple USB quick recharging ways, like PC, chargepal, etc. This rear light offers multiple installation ways, helmet installation, saddle installation, and seattube installation, suitable for different bikes and cycling scenarios, to meet your different needs and ensuring safety at night. Specifications: Name: Bicycle Rear Light Material: ABS Battery: 1 * 3.7V, 500mAh lithium battery (included); 1 * 3.0V, 220mah CR2032 battery (included) Item size: Light: 100 * 35mm / 3.94 * 1.38in Remote controller: 35 * 55mm / 1.38 * 2.17in Package size: 205 * 104 * 38mm / 8.07 * 4.09 * 1.50in Package weight: 167g / 5.89ounce Packing List: 1 * Bicycle Rear Light 1 * Remote Controller 1 * Belt 1 * USB Cable