1.Please Read The Product Description Notes Carefully Before buying
2.Low energy;comfortable chest belt;2.4GKz frequency
3.Via Bluetooth to make the heart rate chest belt connect with the iphone or other smart device directly.
4.Bluetooth heart rate monitor can work even when you're answering a phone call , sending messages or using other applications at the same time
5.The heart rate monitor help you clearly to record everyday's exercise,to make the exercise plan more reasonable,also intelligentized your life.