Featuresr you must connect phone through bluetooth before user only for ios 70 android 43 above bluetooth 40 smartphonesr pedometer track daily activities including steps distance and caloriesr track sleep quality monitor your sleep qualityr it is also a health partner be ready to help you to do physical exercise at any timer as a smartphone companion and sports partner it is the best product for yourself and your friends r perfect design convenient to take alongr r noter when