Description This item is a wireless bike odometer, which is suitable for most types of bicycles: common bicycles, mountain bikes, road bikes, electronic bikes, folding bikes, almost all cycling bicycles. Help you monitor your riding performance. Good design, easy installation and operation. Features - Color: Light green - Material: Plastic - Size: About 6.00X4.40X1.50cm/2.36X1.73X0.59inch - Battery: 1 x CR2302 button battery - Works well to measure speeds, riding time etc., a great gift to bicyclist or fitness fanatic lover. - Small size, lightweight and wireless design make it suitable for most types of bicycles. - Use a simple way to monitor your riding performance, make your riding safe, funny. - Easy installation on your bike and motorbikes, you can install it easily by yourself. - A great accessory for bike, easy to install and remove, increasing their cycling safety. Works well to measure speeds, riding time etc., a great gift to bicyclist or fitness fanatic lover. Small size, lightweight and wireless design make it suitable for most types of bicycles. Use a simple way to monitor your riding performance, make your riding safe, funny. Easy installation on your bike and motorbikes, you can install it easily by yourself. A great accessory for bike, easy to install and remove, increasing their cycling safety.