Bicycle odometer speedometer-bike cycling Item no.: Ms-601 Display the driving mileage, time and speed; Examine the total driving mileage, total time and the fastest speed; Temperature and clock function, display the voltage of battery and auto-display the maintenance of bicycle, add-subtract speed is displayed with movements, over-speeding warning, more safer; Auto-lamp when in the night, each item of data can be grasped at any moment. The style design is modern, waterproof and portable. Size(cm):9.1x4.8x3.8 Packing size(cm):49x30.5x31.5(120pcs) Gross weight(kg):19.6 (bicycle odometer and speedometer, multifunction bicycle odometer speedometer bike cycling, mini bicycle computer. )