USB rechargeable bicycle light, can be attached to handlebars of 22-35mm. - Type: USB rechargeable bicycle light mounting device - Mounting Size: 22-35mm - Compatible Cable: Micro USB I bought this device to attach the light when I purchased it, but I ended up with a spare set because the light came with one. This is a set of the device, charger, and instruction manual. Instruction manual for light installation ※Please note that the light itself is not included in the listing. I also have the box the light came in, so if you would like the empty box, please comment. Please comment if you have any questions.