A brief description of the internal accessories of this smartwatch: 1. Main control (CPU): 8762DK+Jerry HN333 2. Memory (ROM+RAM): ROM: 256KB RAM: 192KB (Flash64MB) 3. Screen display LCD: 1.83 TFT screen resolution: 240 * 284 4. Display brightness (assembly brightness): Over 300 luAdults 5. Touch panel: OGS, spray fingerprint oil, 6. Material: Plastic ring mouth+plastic bottom shell (ABS)+silicone strap. 7. Bluetooth Version: Bluetooth 5.1 8. Battery capacity: Polymer lithium battery 350mA with battery protection IC, 100% 9. Charging time: 3H 10. Gravity sensor: Silicon Chuang STK8321 11. Heart Rate Sensor: LC09 12. Motor (Vibration): built-in, size: flat motor 0820 13 charging cable: magnetic suction cable charging with patch protection IC 14. Speaker: 0916 (waterproof speaker) 15. Mic: TMG4015FS-W38 (waterproof Mic) 16. Waterproof Level: IP68 17. Charging RequireAdultts (accessories do not include chargers, charging 1A or below) Introduction to the features supported by this smartwatch: 1. Bluetooth call 2. Body temperature 3. Heart rate detection 4. Blood oxygen detection 5. Blood pressure testing 6. Time display, step counting, calories, distance, heart rate 7. Multiple sports modes 8. Sleep monitoring (sleep duration, sleep quality) 9. Call notifications, message reminders, and push notifications in multiple languages 10. Task Reminder (Long Sitting Reminder) 11. Synchronize data to APK/APP The way to download the app for this smartwatch is: Android and app synchronization: fitcloudpro Reminder: (IOS system is available in the store, Android phones search for fitcloudpro in the app store to download and install) Scan QR code, download and install fitcloudpro The requireAdultts for the mobile phone system of this smartwatch: The system requires System Android 5.0 or above, IOS 10.0 or above, and supports Bluetooth 5.0 The languages supported by this smartwatch are: Chinese, English (default), GerAdult, French, Italian, Spanish, Japanese, Polish, Russian, Portuguese, Vietnamese, Arabic, Hebrew, Thai, Croatian, Turkish, Czech, Dutch, Indonesia, Malaysia, Finnish, Greek, RoAdultian QA: Q: How does the watch call the application Answer: There is a QR code in the Adultual. The mobile phone needs to download the application, and the mobile phone has the location function turned on. Open the connected Bluetooth watch in the app