This Wired Bicycle Computer With Backlight Is Good Companion For Your Riding, It Not Only Shows The Current Speed, Odometer, Trip Distance, But Also Shows The Average Speed, Maximum Speed And So On. It Is Really An Ideal Assistant For Bicycle Training. Features: Wired Bicycle Speedometer, Includes All Vital Functions For Novices And Pros Alike. Easy To Read, Big Four-Line Backlit Lcd Display. Durable And Waterproof For Use In All Conditions. Easy Installation, No Tools Required. Powered By Battery. Ideal Assistant For Bicycle Training. Note: After Being Soaked In Water, Please Wait A Moment Before Pressing Any Button. Functions: Spd: Current Speed Odo: Odometer Dst: Trip Distance Mxs: Maximum Speed Avs: Average Speed Ttm: Total Trip Time Tm: Trip Time Rat: Riding All Time Clk: Clock (12H/ 24H) Sw: Stopwatch Temperature Tm Up: Trip Time Up Tm Down: Trip Time Down Trip Up: Trip Distance Up Trip Dn: Trip Distance Down Sleep Mode Comparator Maintenance Alert Machine Oil Reminder Over-Speed Reminder Setting Type Circumference Low Battery Indicator Auto Backlight Freeze Frame Memory Auto On/ Off. Specifications: Color:Black Power Source: Battery Dimensions: 5.7 * 4.1 * 2Cm / 2.2 * 1.6 * 0.8In Lcd Screen: 3 * 3.3Cm / 1.2 * 1.3In Package Size: 14 * 7 * 4Cm / 5.5 * 2.8 * 1.6In Package Weight: 80G / 2.8Oz Package List: 1 * Lcd Bicycle Computer 1 * Magnet 1 * Mounting Shoe + Sensor 1 * Set Of Cable Ties 1 * User Manual