I apologize for the poorly written text. I purchased this at a TREK dealer at the beginning of July this year and am now putting it up for sale. Clamp-style LED tail light, black, easy to install. - Type: Tail light - Color: Black - Mounting method: Clamp-style - Light source: LED Used for 3 months. It's a rechargeable tail light. Please understand and accept that it has been used. If you'd like, please feel free to put it on your bicycle. Thank you for looking.