[Solar aided energy support] Featured a solar panel, the bike computer can generate electricity in the sun or under the light, no matter how week the light is. Provides extra power to the computer and extends service time of batteries.[Multi-functional and easy to operate] Built-in 20 functions, works well to measure speed, distance, riding time etc which what any serious bicyclist or fitness fanatic needs. Large display ,lightweight and wireless design make it suitable for most types of bicycles.[Wireless and IPX7 Waterproof] No messing up with wires,easy to intall the bike computer. The computer has been tested in raining days.It's fine to make it immersed in the water for a while ,use it in a drizzle or even in pouring rain.[Large display & Backlight] Large values display makes it easy to track trip details on the go. Backlight for worry-free night cycling.[Record datas of TWO bikes] This bike computer can be used to record datas of two different bikes so you dont need to reset data when you change bike.