Wide Field of Vision: Wide-angle design, LED bike lights make it easy to see other road users at night or in the dark. When equipped with ultra-wide LED lights, it is very useful for you to increase safety, which will allow you to be more easily seen by other road users. Passenger sensor Smart Braking: The built-in accelerometer can provide accurate brake detection. With brake sensor, the super bright auto brake light will turn on automatically after braking. The lights on the bike are so bright you can see it from afar. Really attract attention and ensure your safety. Sensing function: In rapid flashing and breathing mode with light sensor, the flashing light will automatically turn on when the light is low and automatically turn off when the light is strong. Save time turning on the bike taillights Waterproof and Rechargeable: The IP65 waterproof bike taillight can prevent water splashing from any angle. Built-in 400mAh lithium-polymer battery, with USB data cable, can be charged by computer, wall charger, home charger or any device with USB port. Easy to Install: The saddle and seat post holder is suitable for all road bikes. Saddle mounting bracket and included adjustable silicone strap make the bike tail light flexible for quick installation or connection to bike, seat post and helmet. Very easy to unscrew and load from the frame cover. 100% brand new and high quality, made of aluminum, lightweight and durable, giving you ultra-high performance. Built-in accelerometer ensures accurate brake detection. When slowing down or suddenly braking, the warning lights will automatically light up to warn the vehicles behind. Power indicator, four small flashing blue lights to remind you to charge, allow you to move around without worry. Hang it anywhere on a belt, running gear, reflective vest, backpack, dog collar, seat belt, or clothing. Ride a bike, helmet, skateboard, scooter, stroller, wheelchair or anywhere you can imagine. Product Size: 4cmx3.4cmx3.4cm Shipping Quantity: 1 set