Features: 1. Smart Steering Bicycle Tail Light: Our LED Bicycle Tail Light with 38 LED high-bright light beads with a lab-tested real output of 110 lumens is an excellent day and night bicycle light with a 270 Degree beam angle and 492 feet of visibility for safe riding. 2. Five multi-function modes: In addition to the common red always-on/flashing mode, this waterproof bicycle light also provides a yellow flashing mode, left and right turn signals, all of which will be turned on by the controller. Makes you more visible when riding at night. 3. USB rechargeable: The bicycle turn signal uses a 500mAh battery, which allows the bicycle tail light to be fully charged within 2-3 hours, and can work for about 10 hours under constant brightness. The remote control uses a 2032 button battery, and the signal light can be charged from any USB port, which is convenient and saves money and hassle. 4. IP44 waterproof: IP44 waterproof level makes this bicycle turn signal can be used in light to moderate rainning, which can protect your safety and make your bike more cool. 5. Easy installation: easy to install on seatpost (light unit) and handlebar (remote control unit), with flexible silicone mounting straps, suitable for all types of bikes, road bikes, mountain bikes, hybrids, also available with Used as bicycle wheel light, backpack light, wheelchair light, scooter light. Notice: 1.Actual color may be slightly different from the image due to different monitor and light effect 2.Please allow 1-3cm deviation due to manual measurement Battery capacity: 500mAh-3.7v Remote control battery: 2032 button battery Battery life: 12 hours Red light mode: long on - slowing flash - fast flash Product size: 8.8*1.9*3cm Waterproof grade: IP44 Material: ABS Package List: 1 x LED Bike Tail Light