CardioSport Go 35S Heart rate Monitor Watch with Stretch Fabric Transmitter Stopwatch with countdown timer. Personalized calorie counter program Time in target zone & heart rate for workout Personalized calorie counter. Automatic heart rate recovery timer to track fitness improvements Summary Scan feature and Memory recall showing how hard you have been exercising Electroluminescent light. Stretch Fabric chest belt which will stretch and move with your body for maximum comfort. Machine washable and user changeable battery saving time and money