Using dual-band technology, the TICKR connects to most smartphones, GPS watches, and bike computers to monitor heart rate and calorie burn during any activity or workout.Tracks heart rate and calories burned in real-timeDual technology: both ANT+ and Bluetooth capabilities allow it to connect to both smartphones and GPS watchesSee the connection: equipped with two LED lights to show the TICKR's device connection and heart rate detectionWorks seamlessly with over 50 iPhone and Android Apps including Runkeeper, Strava, MapMyFitness, and Cyclemeter/Runmeter