This new type of multifunction bicycle odometer can display all information about the riding speed, mileage and time dynamically when riding. It also includes the function of thermometer, clock and stopwatch. Real-time display helps track speed, distance, time, and multiple data instantly Auto backlight function, it will automatically turn on/off backlight when sunset/sunrise IPX4 water resistance allows for riding in rainy days Easy installation, and good durability. Provided mounting accessories for different demands Powered by a CR2032 battery(included) Functions: 1. SPD: CURRENT SPEED 2. ODO: ODOMETER (0-99999 km/mile) 3. DST: TRIP DISTANCE 4. MXS: MAXIMUM SPEED 5. AVS: AVERAGE SPEED 6. OTM: TOTAL TRIP TIME 7. TM: TRIP TIME 8. RTM: RIDING ALL TIME 9. CLK: CLOCK (12H/24H) 10. SW: STOPWATCH 11. TEMPERATURE (-20℃~90℃) 12. TM UP: TRIP TIME UP 13. TM DN: TRIP TIME DOWN 14. TRIP UP: TRIP DISTANCE UP 15. TRIP DN: TRIP DISTANCE DOWN 16. “+” “-” COMPARATOR 17. SETTING SPEED SCALE(km/h, m/h) 18. MAINTENANCE ALERT 19. LOW-SPEED REMINDER 20. CARE REMINDER 21. SETTING TYRE CIRCUMFERENCE(0mm～9999mm) 22. SETTING THE LAST VALUE OF ODOMETER 23. SETTING OTM 24. FREEZE FRAME MEMORY 25. LCD BACKLIGHT 26. LOW BATTERY INDICATOR 27. AUTO ON/OFF Specifications: Water resistance: IPX4 Power source: 1* CR2032 battery (included) Dimensions: 8.5 * 4.8 * 1.5 cm / 3.3 * 1.9 * 0.6 in