SUUNTO T4 and Foot Pod Marathon Combo Pack Wrist-top computer with integrated Foot Pod for measuring speed and distance Gauges current, average, and maximum heart rate and real-time calories burned Suunto Coach mode generates 5-day plan for improving aerobic condition Foot Pod measures foot speed in seconds or mph; 3-tier zone training system Water-resistant to 100 feet; user-replaceable battery; 2-year warranty