BOI(BEST ORIGIN) I6 Flex Wireless Activity and Sleep Wristband Bluetooth V4.0 Pedometer Smart Wristband Bracelet with Sports Sleep Tracking Activity Tracker Compatible for Iphone and Android(iphone 4s / 5 / 5c / 5s / 6 /Ipad 3 /Ipad Mini and Ios 7.0 Above ; or Android 4.3 Above and Bluetooth 4.0)