Feature:  1. 2.8'' Large Screen odometer and speedometer wireless have a large LCD display, which is only smaller than credit cards.  2. Night backlight, making riding safer, bicycle speedometer wireless with a green backlight can provide high visibility during the day and night, and touch MODE or SET to wake up the backlit screen.  3.Waterproof Bike Mileage Tracker. speedometer for bike mph has a rubber ring and a completely sealed compact body, which works well when working as usual on rainy days.   4.Suitable for most types of bicycles: common bicycles, mountain bikes, road bikes, electronic bikes, folding bikes, almost all cycling bicycles with NOTICE NOT suitable for solid wheels.    Specification:  Product name:Bicycle computer;  Colour:Black;  Battery: 2032 button battery;  Size: 7*5*1.5cm;  Backlight Color: White, Green;  Applicable models: Mountain bikes, bicycles;  Installation position: Horizontal handle, vertical handle;  Whether waterproof: Yes ;    Package included:  1x Bicycle Computer (built-in battery);  1x Wireless Extender;  1x Strong Magnet;  1x Nylon cable tie;  1x Manual;  1x Shockproof Foam Pad;  1x Wireless probe