HD12 1.75 inch IP68 Waterproof Smart Watch, Support Blood Oxygen Monitoring 1. Solution APP: FitCloudPro 2. Main control chip CPU: BLUETRUM BT8959T5 3. Compatible systems: Android 5.0 and above, iOS 10.0 and above 4. Screen type: AMOLED 5. Screen size: 1.75 inches 6. Resolution: 390x450 7. Machine head size: 40x35x10.5mm 8. Touch screen ICtype: CST816D 9. Bluetooth: BLE5.3 10. NFC: Yes 11. Acceleration sensor: gsensors STK8321 12. Heart rate: HX3918 13. Battery type: polymer lithium battery, capacity: 3.8V230mAh-501528 14. Charging method: magnetic charging 15. Exercise: step counting, calories, distance, exercise mode 16. Health: blood pressure, heart rate, blood oxygen, sedentary reminder, sleep monitoring, automatic heart rate monitoring, etc. 17. Smart reminder: incoming calls, text messages, emails, WeChat, QQ, Facebook, Twitter, WhatsApp, LinkedIn, Instagram, Messenger, Snapchat, Line, Kakao Talk, Viber, Skype, telegram 18. Others: raise your wrist to light up the screen, alarm clock reminder, remote control photo taking, search for mobile phone, etc. 19. Sports mode selection: walking, running, mountain climbing, cycling, rope skipping, basketball, badminton, football, yoga +1 is as a push sports mode 20. Others: OTA, shortcut bar (control center), data (step counting, distance, calories), heart rate, blood pressure, blood oxygen, sleep, raise your wrist to turn on the screen, weather, WeChat sports, information, reminders (messages, drinking water , sedentary, alarm clock), women's health, stopwatch, countdown, find phone, find bracelet, shake to take photo, dial switching, music control, settings (language selection, brightness adjustment, screen on duration, vibration setting, factory reset, Version information), power on and off logo, components (function editing), password lock, breathing training, exercise, exercise history, do not disturb mode, power saving mode, low battery reminder, voice assistant (SIRI), call function, frequently used contacts , phone dial pad, spl