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-time -Dual technology: both ANT+ and Bluetooth capabilities allow it to connect to both smartphones and GPS watches -See the connection: equipped with two LED lights to show the TICKR’s device connection and heart rate detection -Works seamlessly with over 50 iPhone and Android Apps including Runkeeper, Strava, MapMyFitness, and Cyclemeter/Runmeter -Real time heart rate and calorie tracking -Integrated strap and pod design provides a more secure connection, more comfortable wear -Supports up to three Bluetooth connections simultaneously -Redesigned battery door provides a better seal to ensure proper function after battery installation.