I am selling this item because I haven't used it recently and no longer need it. I purchased it and used it a few times, but it has been stored for many years. Since it is missing the base and I haven't been able to confirm its operation, I am selling it as junk. This is a cycle computer with a digital speed measurement function and an easy-to-use circular design. - Model Name: Cycle Computer - Function: Speed measurement function - Design: Circular design - Color: Black - Display: Digital display Thank you for looking.