A wireless cycle computer that measures speed. - Model Name: CC-VT100W - Type: Wireless - Functions: Speed measurement, auto start - Instruction Manual: Included Thank you for viewing. I received this from someone a few years ago, but I already have one, and it has been sitting unused in my room, so I am selling it to declutter. Since it is new and unopened, I have not confirmed its operation. Also, please refrain from purchasing if you are looking for a perfect item or are overly concerned about minor details, as it has been stored by a private individual. No claims and no returns, please.