This Waterproof Bike Speedometer Bicycle Odometer is an essential item for any cycling enthusiast. With its black color and handlebar mount, it is easy to install and use with its button interface. The odometer provides accurate measurements and the speed sensor ensures that you are always aware of your speed. In addition to being waterproof, this Bike Speedometer also features a compact design, making it easy to carry around while cycling. It is perfect for any sport or activity related to cycling, and with free shipping and a 30-day return policy, you can be sure that you're making a smart purchase.