To track your riding speed, distance, RPM, time and calories?and so on data so you can?master your cycling state and have a adjustment at any time. Features: Real-time display: Current speed, riding time, riding distant and current time and date. Show data: View the Average/Maximum speed, Accumulated distance/ RPM/Calories consumption, Accumulated time/Trip time, Temperature/Date. Back light: LCD display with back light allows you to read riding data easily and clearly during night trip. Convenient: Buttons control for easy operation. Small size, light weight and easy mount on your bike. Stopwatch for you to check the data in competitions. Unit options of kilometer / mile, 12h / 24h systems, Celsius / Fahrenheit temperature systems. IPX5waterproof for good protection in raining days.Please do mot soak into water for long time. 14 Functions: Date and Time(DA) Temperature(Th) Riding speed(SPD) Maximum riding speed(MAX) Average riding speed(AVS) Riding distance(DST) Accumulated distance(ODO) Calories(CAL) RPM Riding time(RT) Riding accumulated time(RAT) Trip time(TT) Stopwatch LED back light KM/MM, C/F, 12h/24h conversion Specification: Model: Wired / Wireless (optional) Material: Plastic Waterproof: IP X5 Power: 2 * 3.0v 240mAh CR2032battery (included) Host size: 5.5 * 4.3 * 2 cm / 2.1 * 1.6 * 0.7 in Host weight: 30 g / 1.0 oz Package weight: 64 - 71 g / 2.2 - 2.5 oz Package List: 1* Bike Computer 1* Magnet 5* Ribbon 1* Foam Pad 1* Wire Sensor Cable