Wristband size: width 22mm.Body size: 45.5*11mm.Watch weight: (silicone strap): net weight 40.5g.Display size: 1.3inch full circle.Resolution: 240*240 IPS.Touch form: full touch screen.Polymer lithium battery: 230mA.Use time: 3-5 days.Standby time: 30 days.CPU: HS6621.PPG heart rate: Silan Micro SC7R30.UI storage flash: 64MBT.G-sensor: 3-axis SC7A20.Vibration motor: wire-bonded type.Built-in Bluetooth: Dual Bluetooth 5.0, 3.0.System version support: Android 5.1 and above, Apple 8.0 and above, Apple 5S and above.Connecting mobile phone Bluetooth distance: 10-15 meters.Bluetooth calling: support.Multi-dial switching (Dial Mall): Support .Custom watch faces: Supported.Step count, calories, distance: support.Multi-sport mode: support (cycling, swimming, running, mountaineering, walking) and other sports.Turn your wrist to brighten the screen: support.Running track: support.Call reminder, message reminder: support.Sedentary reminder, alarm clock reminder: support.Shake to take a photo: Supported.Heart rate, blood pressure, blood oxygen, sleep monitoring: support.Health data records: support.APP name: wearfit pro.Charging method: Magnetic suction.OTA upgrade: support.Waterproof grade: IP68.APP interface supported languages: Chinese, Traditional Chinese, English, French, German, Japanese, Spanish, Italian, Russian, Czech, Portuguese, Turkish, Greek, Vietnamese, Thai, Arabic, Polish, Dutch.