Boost your performance with the real-time running statistics provided by the Soleus GPS 3. 0 Heart Rate Monitor. This high-sensitivity GPS watch tracks your speed, pace, and distance, helping you set tangible goals whether you're training for your next ten-kilometer race or simply pushing your personal running limits. The included heart rate monitor features an adjustable elastic strap for a secure, comfortable fit, and it communicates with the watch for real-time heart rate monitoring. Helping you burn calories, this watch works with your personalized data to track current and total calories burned. In addition, it charges and uploads data via an included USB to Soleus' Sync software. This free software can be effortlessly downloaded online, and it works with both PC (XP or newer) and Mac (OS 10. 6 Snow Leopard or newer).