HD8C 1.43 inch BT5.4 Rotate Dial Smart Watch, Support Bluetooth Call Sleep Blood Oxygen Heart Rate Blood Pressure Health Monitor 1. Prameters: APP: FitCloudPro Chipset: Bluetrum AB5691 System: Android 5.0 and above; iOS 10.0 and above Flash memory: RAM 400KB, ROM 128Mb Screen: TFT Size: 1.43inch Resolution: 360*360 Touch IC: CST816D 2. Connection parameters: Bluetooth calling: Bluetrum AB5691 Blutooth: BLE 5.4 WIFI: None NFC: Yes 3. Sensors: Accelerometer sensors: SC7A20H Heart rate: HX3918H （with liveness detection） Hall switch: Yes GPS: None Body temperature: None 4. Battery: Battery type: Li-Polymer Battery Capacity: 3.8V300mAh502025 Charging way: Wireless Charging 5. APP software functions: Sport: Count steps, calories, distance, movement patterns Health: Heart rate, blood oxygen, sedentary reminder, sleep monitoring, automatic heart rate monitoring, etc Intelligent reminder: Call, SMS, Email, wechat, QQ, Facebook, Twitter, WhatsApp, LinkedIn, Instagram, Messenger, Snapchat, Line, Kakao Talk, Viber, Skype, telegram etc. Other functions: Raise the wrist to light the screen, alarm clock reminder, remote control photo, find the phone and so on 6. Hardware function: Sport data: Distance, calories, steps, real-time heart rate, exercise duration Sport mode selection: Outdoor sports, fitness sports, ball games, water sports, etc. Others: OTA, Quick Settings Panel (Control Center), Data (step count, distance, calories), heart rate, blood pressure, blood oxygen, sleep, wrist-raising to wake screen, weather, WeChat Sports, messages, reminders (notifications, water intake, sedentary, alarm), women's health, stopwatch, countdown, find phone, find bracelet, shake to take photo, watch face switching, music control, settings (language selection, brightness adjustment, screen-on duration, vibration settings, factory reset, version information), power-onoff logo, components (function editing), password lock, breathing training, exercise, exercise history, do-not-disturb mode, power-saving mode, low-battery r