B05 smart bracelet function description: Function Band Screen Bracelet (0.96 inch TFT) Heart rate detection Time display, step count, calorie, distance display with screen Standard sports function (step, distance, calories) Sleep monitoring (sleep time, sleep quality) Incoming call notification, message push Anti-lost alert (mobile phone out of range alert) Specifications Mobile phone system requirements: Android 4.4 and above, IOS 8.0 above, Bluetooth 4.0 Bluetooth version: Bluetooth 4.0 Bluetooth chip: Mcube ST17H25 Heart rate module: HRS3300 Screen display: 0.96 inch/TFT Battery Capacity: 110mAh Standby time: 15 days or so Working hours: 5-7 days Keys: Touch keys Motor: Built-in, vibration alert Charging interface: USB line Waterproof rating: IPX7 Sensor: Gravity Sensor