This monitor has three basic functions. 1. The music controller is not valuable since your iphone cannot be too far for the bluetooth connection. 2. The hearth rate monitor seems to be accurate. 3. The activity monitor is a joke. At rest, 70 bpm, it shows you are burning 4 kcal per minute. I usually obtain 1.7 kcal per min using other monitors. I suppose a software update can fix that, otherwise it is a waste.
