16 different functions: This 16 functions bicycle computer can meet your different riding needs by tracking your riding data such as comparing speed, average, maximum, relative, riding time, flange path and so on. br> Wireless and Waterproof Design: Fashionable and new design makes this wireless and waterproof bicycle speedometer more durable. You don't need to worry about rainy days, but avoid being exposed to rain and water for longer as it can absorb. Large LCD Display with Green Night Lights: This bicycle computer with green backlight in a large LCD display allows you to easily read digital, especially in the deep dark night or in the long tunnel. You can easily turn on the lights by pressing a button on the MODE or SET. Convenient and fast recording: This tachometer can record speed and kilometers without any delay. When you drive again, it can start your driving time directly. Wide application: The bicycle tachometer is suitable for all bikes such as mountain bike, road bike. but please follow installation instructions. Functions: 1. Record the travel speed (SPD) 2. Record the total distance covered (ODO) mileage 3. Record single lane mileage (DST) 4. Maximum travel speed (MXS) 5. Display the average travel speed (AVS) 6. Display driving time (TM) 7. Display of clock hours in 12/24 (CLK) 8. Scan 9. Immediate comparison (" + " " - ") 10. Set of miles (KM / hr, M / hr) 11. The tire circumference is set (SET) 12. The total duration of the adjustment of the initial value (SETTING TIRE CIRCUMFERENCE) 13. Driving data sampling function (FREEZE FRAME MEMORY) 14. Switch: automatic wake-up from sleep mode (AUTO ON / OFF) 15. Interference resistance signals 16. Backlighting This is a " motion detected " bicycle computer, it will be in standby mode if no motion detected, when motion detected, the bicycle computer will automatically turn on. Is there a scroll switch? Movement detected? inside the computer, it vibrates and makes noise, please note that the noise is caused by the switch, the product is not broken or used. Directions for use: 1. Before installing this speedometer, read the instructions carefully Then install it only on the front wheel. 2.The distance between the computer unit and the sensor did not exceed more than 60cm, then the distance between the sensor and the magnet not more than 2.5mm, the less the better. 3. Please see the instructions for setting up the data and using it Package contents: 1 x The bicycle tachometer 1 x Sensor 1 x Magnet