Forfar Bike Computer, Wireless Bicycle Speedometer,Bike Odometer Cycling Multi Function Easy-to-read LCD display : Big LCD display with big numbers so you can easily see the stats even you are riding. Portable and convenient: It is very small and light but you can have the basic info you need in monitoring your biking activity, measuring speed ,distance, riding time, maximum speed and average speed. Wireless and waterproof design makes it more convenient and durable. Long gone are the days of a bunch of ugly, tangled wires on your handlebars, and no need to worry about rain. The backlight can be set in either green and white color. Power saving,wake up by pushing the buttons and won't wake up every time it moves Warranty and Service: 6 months return ,replace and refund guarantee. For any problem, will respond within 24 hours.