The Spree SmartCap is a unique activity tracking device that is worn as a baseball cap rather than a wrist watch. Using a Performance Optimization Device (POD) with a built-in accelerometer and advanced plethysmograph, the Spree Headband that powers the SmartCap can give you detailed information about your workout like calories burned, heart rate, and body temperature. These extensive metrics allow you to fully understand your performance so that you can continually improve. The Spree SmartCap can be purchased for $29.99, but the POD will need to be purchased separately, at a total cost of $199.00.