Featuresr you must connect phone through bluetooth before user only for android 23 to 42 ios 70 bt40 above smartphonesr it is a health partner be ready to help you to do physical exercise at any timer anti lost watch will send alarm after leaving the mobile phone a certain distance10m r sleep monitor it can monitor you quality of sleep to help you improve you sleepr both as comfortable watch smartphone companion and sports partner it is the best product for yourself and your f