Spree SmartCap with Integrated Heart Rate Monitor Head placement gives you the most accurate heart rate, body temperature, movement and calories burned and protection from the sun with UPF 30 Keeps you from the constraints of chest straps, while capturing all essential workout parameters in a single easy to use device Spree syncs with a smartphone app to track your workouts and show real-time progress of your fitness goals Spree App for Android (4.4.2 and up - Samsung Galaxy S3 & up, HTC One M8, LG G3), iOS (iPhone 4S & up, iPod/iPad 3 & up) and selected 3rd-party apps Package includes Spree Smart Cap, Headband, sensor POD, charging cable and manual