WIDE FIELD of VIEW： The led bike back light will make you more visible for other road users in dark night or daytime. It will be great for your extra security in ridingequipped with ultra bright wide beam LED, will make you more visible for other road users.SET YOUR OWN LIGHT MODES：3 Light Modes: Long press to power on/off. Short press to switch modes. Mode 1: Slow flowing light. Mode 2: Fast flowing light. Mode 3: Flashing. You can switch different modes according to your needs and different occasions to get the best lighting experience.USB Rechargeable：The brightness of this rear bike light is adjustable, Supports USB charging, can be fully charged in about 1 hour, and can last for about 10 to 12 hours. No more wasting money buying disposable batteries.WATERPROOF REAR LED：IPX5 Waterproofing keeps the tail light safe from splashes and water from all angles. Cycle and work out with peace of mind. Stay safe and highly visible even in light rain. The USB port is snug against the bike / bag for safety.EASY INSTALLTION：Saddle mounting and Seat Post mounting offered fit on any road bikes.Saddle mounting bracket and adjustable silicone strap provided, make the bicycle rear light flexible to quick install or detatch on bicycles, seat post, . Very convenient to unscrews from the mount cap for recharging.