Package Include 2 x Wireless Bike Odometer Features - Display current velocity, maximum velocity, average velocity, elapsed time. - Battery voltage: 3V - Suitable for most bikes and electric bike. Road bikes, mountain bikes, folding bikes and other common bikes can be installed. - Material: Acrylic, ABS. - The product has LCD display screen, and it' s easy for you to read when riding. - With detachable design, easy to remove while not on the bike. - The product is made of high- quality ABS material, durable to use. Goods Description This item is a bike odometer, which is suitable for most of bicycles: common bicycles, mountain bikes, road bikes, electronic bikes, folding bikes, almost all cycling bicycles. Help you monitor your riding performance. Wireless design, easy installation and operation.