Parameters: CPU: RTL8763E Dimension: 49*43*13.8mm Shell: Titanium alloy case Strap: Standard silicone strap, suitable for 44/45/49mm strap Charger: Wireless magnetic charging Screen: 1.91-inch HD LCD screen,425*518 resolution Support: Android 5.0+, IOS8.0+ Battery: Lithium-ion polymer battery, 450mAh Bluetooth: Dual Bluetooth Support: Heart rate, Breath training, Blood oxygen, Different Sport modes, Ai voice assistant, Pedometer, Sedentary reminder, Sleep monitor, BT music, Dialer, Alarm clock, Calculator, Stopwatch... Watch Function Bluetooth calls, contacts, message push, NFC access control unlock, drinking water reminder, sedentary reminder, heart rate monitoring, blood oxygen monitoring, sleep monitoring, independent alarm clock, Different sports modes, lock screen password, screen out display, custom watch face, voice assistant, calculator, timer, bedside lamp, raise hand to light up the screen, vibration adjustment, brightness adjustment, volume adjustment, music control Note: NFC door access: The watch has a built-in NFC chip, there is no NFC software icon on the watch, you only need to use the watch as an NFC access control card, record the NFC ID of the watch through the access control system, and then the watch can be used as an NFC access control card. Waterproof: life waterproof allow the watch to be used normally when washing hands and in rainy days, but not allow to swimming and bathing. (Please be careful to avoid corrosive liquids like hand sanitizer, soap enter the watch and cause component damage.) Smart Watch Support Language: English, French, German, Italian, Spain, Portugal, Turkish, Russian, Thai, Vietnamese Package: smart watch*1 charging cable*1 user manual*1