TomTom Runner Cardio gives you GPS pace and distance data, and heart rate data without a chest strap via built-in Mio laser technology. Find satellites quickly when ready to run with QuickGPSFix. Set custom intervals or race against your previous workouts in Run mode. Track pace and distance on the treadmill thanks to a built-in accelerometer. This simple-to-use watch features a large display and a 4-sided button to easily navigate menus. Plug it into your computer or connect wirelessly via iPhone with Bluetooth Smart to upload data on TomTom's MySports online account, or 3rd party sites like MapMyFitness.