With the LCD display of a bicycle computer with green backlight, you can read the dark and distant night digitally or the long tunnel. 16 functions compare speed record, average, maximum, relative, driving time, used record, stopwatch etc. Waterproof design makes it more durable. The outline of the counter is simple and cool, and with its waterproof design, it will always be fashionable and new. Convenient and fast to record speed and kilometers without delay. One push when you're riding again, grab this bike computer and start your journey right away. This wireless bike computer has an auto-on function via a scroll switch built into the computer so that a tone sounds. This is not a product defect, it is a normal phenomenon. If you have any problems with our bike computer, you can contact our customer service directly. They will solve your problem perfectly. Tire circumference adjustment function 1. Adjust according to the size of the bicycle tire. Speed function: 2. Current driving speed SPD 3. Maximum moving speed MXS 4. Average moving speed AVS 5. Tips for compare with the average speed Wheel rotation function 6. The number of wheel revolutions per minute R (This new product does not have this function) Mileage function (customs / metric switch) 7 0D0 total mileage 8. DST individual mileage 9. Total mileage initial value is set. When the battery is replaced, the value can be set to the initial value before the change. Time function 10. TM trip time 11. hours (12 hour / 24 hour switch) CLK Automatic cycle display function 13. ODO, DST , MXS, AVS. TM, R and CLK function automatically scrolls content every 4 seconds Scanning function for driving data 14. Instant data collection, professional testing including DST TM AVS MXS Function Power-saving mode If there is no input signal within 15.30 seconds, it will automatically enter power-saving mode and only display the time. Maintenance reminder function 16. When the total mileage reaches the set maintenance value, the wrench icon will appear to remind you to repair the bike. waterproof 17. Has good waterproof function. Package: 1 x Bike Computer 1 x Sensor 1 x Magnet 1 x Table Base 1 x Battery 4 x cable ties