The Guee COB-X LED Light Set consists of a front and rear Cob-X light which features a super lightweight profile with a quick rechargeable battery taking only approximately 1 hour 40 minutes to charge and giving you up to 15 hours of burn time. The design of these Guee lights is simple and genius; the silicone band allows versatility whereby you can mount the light almost anywhere on your bike including your seat post, seat stays, handlebar, fork or saddle bag. The Guee Cob-X light set is convenient, economical and a fantastic performer with a super easy and tool-less installation. Guee COB-X LED Light Set Features Super Bright 'COB' LED provides ultimate visibility Micro USB Rechargeable Li-Poly battery Battery power indicator Multi-fit, tool-free fitting 160 degree wide visibility Modes: Flash / Strobe / Constant Light source: High Brightness white and red LED Battery: 3 ... More info