If you are looking for a professional and practical bike stopwatch, then your research is over here. That’s because our product can satisfy your need. High durability, not easy to break. It will be a for you. Can be used as a present to your friends. Features -Color: Black. -Material: PVC. -Size: About 7.00X3.60X1.30cm/2.75X1.41X0.51inch. -Light source: White color. -Power supply: solar/2 button batteries (included). - workmanship and good materials ensure a and perfect details. -It can be a practical present for your friends who love to ride and they will be very happy. -Small size and light weight speedometer is easy to install on your bike. -You can use it even in the rainy days, just dry when cycling or finish your journey. -Road bicycles, folding bikes, mountain bikes and other common bikes are compatible with it. Package list: 1 x bike speedometer 1 x magnet 1 x bracket 2 x rubber slices 4 x plastic straps 1 x rubber 2 x button batteries