Multi-function: Our bike speedometer can record current speed, odometer, trip distance, maximum speed, average speed, electronic use time, clock. 2 - Reset and pair the computer before its first use for the most accurate results. 3 - Install the seat. 4 - Mount the sensor on the front wheel. 5 - Mount the magnets on the spoke of the front wheel. 6 - Place the computer on the seat Product Package Weight: 3.53 oz. Dimensions: 2.20 x 1.61 x 0.78 inches. Display: LCD display Functions: 1. SPD: current speed. 2. ODO: odometer. 3. DST: distance traveled. 4. MXS: maximum speed. 5. AVS: average speed. 6. TM: elapsed time. 7. CLK: clock (12H/24H). 8. Scan: automatic circulatory function. 9. Comparison indicator ("+" "-"). 10. Set miles (km/h, m/h). 11. SET: tire circumference. 12. The total length of the initial value adjustment (tire circumference adjustment). 13. Driving data sampling (freeze frame memory). 14. Maintenance reminder (maintenance alert). 15. Automatic on/off mode (after 300 seconds) Package content: 1 seat. 1 magnet 2 decals. 3 CR2032 batteries. 1 wireless sensor 6 plastic straps. 1 bike computer 1 user manual (Spanish language not guaranteed).