The guee cob x led rear light is a lightweight and rechargeable product which uses a simple silicone design allowing the light to be easily mounted horizontally or vertically on various parts of your bike including the seatpost seat stays fork handlebar or saddle bag this rear guee light has been created with a built in rechargeable battery which takes approximately 1 hour 40 minutes to charge and will give you up to 15 hours of burn time making it ideal for riders in rush guee cob x led re