Product parameter Bluetooth: BLE 5.0 Call Bluetooth: BLE 3.0 Waterproof level: IP67 Main control chip: HS6621, 128M flash, Zhongke call chip Acceleration sensor: SC7A20 Heart rate module: SC7R30 more→, 128KB+1M, red light + green light module, support dynamic heart rate/blood pressure/oxygen detection Display type: 1.28 inch pure round colorful display Touch screen: full touch Screen Diagonal: 1.28" Waterproof Rating: IP67 Heart Rate: Yes Pedometer: Yes Calorie Counter: Yes Compatibility: Android 4.4 , IOS 8.4 Resolution 240*240 pixels Battery type: polymer lithium battery Battery capacity: 260 mA Charging time is about 60 minutes Working time: 5-7 days Standby time is about 30 days …