The TICKR heart rate monitor accurately tracks your heart rate and calorie burn during any activity or workout. Both ANT and Bluetooth capabilities allow for a wireless connection to both smartphones and GPS devices at the same time or separately. Two LED lights show the TICKR's device connection (blue) and heart rate detection (red). See workout data while you exercise, including vital metrics such as heart rate and calorie burn when connected to a smartphone or ANT device. Works seamlessly with over 50 apps including Nike Running, Runkeeper, Strava, and MapMyFitness. You can also connect directly to your Apple Watch as another option for gathering heart rate data in the Apple Workout app.