Product Features: -This speed and cadence sensor accurately tracks and transmits essential cycling data for you, giving you real-time monitoring of your outdoor exercise. -Display your current speed, average speed, maximum speed, time, trip time, distance, etc. -Able to set km unit /h or m/h, 12 hour or 24 hour clock mode by yourself. -Avoid electromagnetic interference from your phone or other radio signals. -Powered by a 65mAh AG10 battery. Ensure long-lasting endurance. -Lightweight and compact. A great tool for outdoor cycling. Specification: Battery: Built-in AG10 65mAh battery Riding time: 0:00:00 to 99:59:59 Bicycle spoke diameter: 2mm and less Operating temperature: -20C at 70C Features: 1. Current speed SPD 2.ODO ODOMETER 3.DST TRIP DISTANCE 4. Maximum speed 5.AVS AVAAGE SPEED 6. Acceleration time TM 7. Clock CLK/(12H/24H) 8.SCAN 9."+" "-" comparator 10. Setting the speed scale (KM/M) 11. Adjusting the tire circumference 12. Setting the last odometer value 13. Freeze frame memory 14. Auto on/off 15. MAINTENANCE ALERT Note: Please allow slight size differences due to manual measurement. Due to the different display and different light, the picture may not show the actual color of the item. Thank you for your understanding.