The Spree Headband is a unique activity tracking device that is worn as a headband rather than a wrist watch. Using a Performance Optimization Device (POD) with a built-in accelerometer and advanced plethysmograph, the Spree Headband 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 Headband is made from silicone rubber for comfort and functions, and comes in a bundle with the POD and SmartCap for $199.00.