Waterproof Wired Digital Bike Ride Speedometer

Details   - This speed and cadence sensor accurately track and transmit essential cycling data for you, giving you real-time monitoring of your outdoor exercise. - Display your current speed, average speed, max speed, time, trip time, distance, etc. - Able to set km/h or m/h unit, 12 hours or 24 hours clock mode by yourself. - Avoid electromagnetic interference from your phone or other radio signals. - Powered by one 65mAh AG10 battery. Ensure long-time endurance. - Lightweight and compact. A great tool for outside cycling. Specifications   Battery: built-in 65mAh AG10 battery Riding time: ranging from 0:00:00 to 99:59:59 Bicycle spoke diameter: 2mm and less Operating temperature: -20 Deg.C to 70 Deg.C