4 LIGHTING MODES & BRIGHT BIKE LIGHTS: This bike tail light got a button on the side which could adjust four different lighting modes depending on your road conditions need: constant lighting,fast flashing,all lights flashing,slow flashing.Multiple lighting modes could satisfy your need in most situations.Five 2835 high-brightness patch lamp beads, large wide-angle floodlight, long range, strong spotlight, illuminate your rear. USB BIKE LIGHT RECHARGEABLE & LIGHT WEIGHT: This rear bike light is built in 220 MAH rechargeable polymer lithium battery. It can be charged by USB cable via computers, chargers or portable power banks. 1.5 hours could help the battery fully charged. When it is fully charged, the bike lights could last 2.5 to 4 hours lighting.Exquisite quality, high brightness, compact and lightweight bike accessories, can be carried with you. IPX3 WATERPROOF & DURABLE: The bike light is made of high quality ABS material of transparent lampshade and shell, which has good durability and not easy to break. This taillight is also water resistant and shockproof, could help you stop worrying about unexpected weather conditions, such as heavy rain or snow. Reflector design, using high-strength reflective stickers, with wide-angle refraction lampshade, it is safe to ride at night even without electricity. SIMPLE & FAST TO INSTALL(2 Methods): The silicone mount strap of the taillight is designed with four openings which could hold tightly on the handlebars and seat bars of the bicycle. 360-degree arbitrary rotation, arbitrary adjustment, taillights with clips,Two installation methods are available: strap installation and buckle installation.This bicycle rear light can be installed anywhere you want, such as your belt, backpack,or balance bikes, etc. General size fits for most bicycle. VERSATILE BICYCLE LIGHTS: Rotatable base design could let you attach the rear light bike flashlight horizontal or vertical on your bike as you like. Versatile and super easy to use, the LED safety taillight is the best option to keep you safe and visible in the night no matter you are walking the dog, jogging, running, or cycling.