CatEye's Strada Smart connects with your smartphone so you can view your ride data while your phone stays safely in your pocket with its battery life preserved. Simply download the CatEye Cycling App and the Strada Smart will display current/average/max speed, distance traveled, altitude, and more. CatEye's speed/cadence sensor and heart-rate monitor (both sold separately) track your efforts even closer. After a tough ride come back and upload your data to CatEye's Atlas, Training Peaks, or Strava to compare your workout to previous rides or your friends' times. And, if you choose to leave your phone at home, the Smart also works with Bluetooth sensors (sold separately).