Wide Field of ViewWide-angle design with 180 degree field of view, the LED bike light will make it more visible to other road users at night or dark night. It will be great for your extra safety while driving, equipped with ultra-wide beam LED, it will make it more visible for other road users.Smart Brake SensorBuilt-in accelerometer ensures accurate brake detection. With brake sensor, auto ultrabrum brake light will turn on automatically after braking. The bike light is super bright and highly visible from afar, really eye-catching to enhance your safety.Sensing FunctionIn light sensor breathing mode and rapid flash, intermittent light will automatically turn it on in low light and off in high intensity light. Save your time to turn on the bike backlight.Waterproof and Rechargeable IPX6 waterproof bicycle rear bike waterproof against splashing water from any angle. The built-in 500mAh lithium polymer battery has a USB cable that charges from your computer, wall charger, power bank or any other device with a USB port. After charging for 2 hours, the tail light can work for 25-50 hours in different modes.Easy InstallationThe seat post and seat bracket fit any road bike. Saddle mounting bracket and adjustable silicone strap provided can make the bike backlight flexible for quick install or release on bikes, seat post, helmet. Very convenient to unscrew from the mounting cover to fill.