If you want to reach the heights of your training, Polar's S625X is all the motivation you’ll need. This advanced computer and versatile cross training tool combines accurate speed and distance measurement with Polar’s leading heart rate expertise to help maximize your training. This mighty computer synchronizes with Polar's ProTrainer 5 Software for logging training, analysis and creating individual training settings. Plus, the highly sensitive barometric altitude sensor shows your elevation profiles. And, no matter what sport you're training for you'll appreciate how the vast array of upload and download options make it easy to analyze your fitness and keep your training program on track.