Heart Rate Sensor Monitor Fitness Tracker Connected With Cellphone By Bluetooth Function 1.Health Care: Provides live, accurate heart rate to compatible mobile training apps through Bluetooth Smart technology.View real-time heart rate, training zones and calories burned on your smartphone or tablet with compatible training apps. 2.Usage: Use our ear clip heart rate sensor or fingertip sensor with transmission / penetration ear clip heart sensor,for the mobile heart rate adapter. 3.Adaptation Cellphones: Compatible with Iphone8,Iphone Xand formerversion, and with selected Android devices including SAMSUNGGalaxy S3 and S4, using Android 4.3 or laterversion. 4.APP: Works with 60 Beat, Heart Rate Monitor, Elite HRV, HRV+. 5.Recharge battery, nominal capacity: 150mAh.Service time: 20 hours. Bluetooth standard connection distance is 10 meters, general within 5 meters is more stable.