Trying to improve your running endurance' The Soleus GPS Vibe Watch helps by providing real time running stats, such as speed, pace, and distance. This way, you can set tangible goals with data to back up your progress or lack thereof, if you need a kick in the butt. The watch's vibration alerts and haptic feedback are ideal for those who tune out to music on long runs, buzzing your wrist every time you touch a button or eclipse your mile lap. Helping you shed calories, this watch can be personalized with your specific 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 painlessly downloaded online, and it works with both PC XP or newer and Mac OS 10. 6 Snow Leopard or newer.