MULTIFUNCTIONAL SAFETY BIKE REAR LIGHT: Easy to install. Lightweight and durable bike tail light that can be mounted on all bikes, children's bike, adult bicycle, handlebars, seat posts, dog collars or anywhere. It also can be used as helmet lights, backpack lights, warning lights and more. Bicycle taillight fits road, mountain, cruiser, scooter. SET YOUR OWN REAR BIKE LIGHT MODES: 5 light mode options: Breathing Flash(8 hours), Strobe(9 hours), Meteor Flash(14 hours), Tai Chi Flash(17 hours), Slow Strobe(56 hours). You can switch different modes according to your needs and different occasions to get the best lighting experience. EXTENDED BATTERY LIFE: Bike tail light on a full charge, enjoy up to 56 hours of usage! Built-in USB charge port for this bike rear light (USB cable included). Please charge it when the indicator light is red. It will turn green when fully charged. WATERPROOF BICYCLE TAIL LIGHT: The bike taillight is made of IPX5 rated water resistant material to ensure a safe use in heavy rain. SAFETY: If your bike doesn't already have a rear bike light, this can be a safety hazard. By installing a bike tail light on your bike, helmet or riding bag, it can give yourself protection. Whether you are riding during the day or at night, a bike tail light can serve as a reminder to others. Safety first! mountain bike accessorie bicycle lights front and rear bike lights bike light bike lights for night riding bicycle light bike accessories for adult bikes bike lights front and back bicycle lights front and rear bicycle lights bike tail light rear bike light bike rear light bike helmet light road bike accessories cygolite bike light bicycle accessories for adult bikes kids bike accessories rechargeable bike lights kids bike lights