Get a free Christmas card with your order now! 4 LIGHTING MODES: VICTGOAL bike taillight got a button on the side which could adjust four different lighting modes depending on your preference. It is included fast flashing & slow flashing alternately, all lights flashing & constant lighting. Multiple lighting modes could satisfy your need in most situations. USB RECHARGEABLE: These rear bike light is built in 220 MAH rechargeable 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 4 to 8 hours lighting. SIMPLE TO INSTALL: 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. This bicycle rear light can be installed anywhere you want, such as your belt, backpack or bike helmet etc. General size fits for most bicycle as a reliable taillight. WATERPROOF & DURABLE: The bike tail 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. The IPX4 waterproof design could help you stop worrying about unexpected weather conditions, such as heavy rain or snow. VERSATILE BIKE LIGHTS: Rotatable base design could let you attach the rear light 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.