Bicycle Solar Tail Light | Cycle Back Light | Cycle Rear Light (Pack of 2) This solar powered tail light for bicycles is the perfect answer to night time riding anad the Light full charged needs 4 hours(sunlight) and work for 6-8 hours EASY TO INSTALL AND REMOVE - Lights are simple and fashion, very easy to install and remove without involving any tools & Perfect for Cycling, Running and other outdoor activities at night for a safe riding experience anytime, anywhere. Whether your long distance biking or watching the kids in the street every biker should own one for safety reasons. There's no need to worry about running out of batteries - The Solar Bike Light fully charged needs 4 hours (sunlight) and work for 6-8 hours. The use of high-intensity, high light transmittance of special tempered glass and high performance solar ultraviolet radiation-resistant and In-box contents - 2 piece of Bicycle Solar Tail Light.