Blood Oxygen Sleep Heart Rate Health Monitoring Smart Watch Square Sports Watch 1. Main chip: Realtek8763EWE 2. Acceleration sensor: STK8321 3. PPG heart rate sensor: LC11S 4. Touch IC: 816D 5. Motor: flat motor 6. Display: 2.01 inch TFT square screen 7. Resolution: 240 x 296 8. Flash size: 128M 9. Bluetooth version: 5.2 10. Bluetooth antenna: FPC 11. Battery capacity: 270mAh 12. Usage time: about 7 days 13. Standby: about 15 days 14. Charging: about 2h 15. Speaker: 1012 hi-fi speaker 16. Charging method: magnetic cable charging 17. Support language: Chinese, English, German, Russian, Spanish, Portuguese, French, Japanese, Arabic, Dutch, Italian, Polish, Thai, Vietnamese, Finnish, Romanian, Turkish, Croatian, Czech, Malay, Greek 18. Health monitoring: heart rate detection, heart rate timing monitoring, blood pressure detection, blood pressure timing, blood oxygen detection, sleep monitoring 19. Standard functions: step counting, exercise distance, calorie consumption, hand-raising display, wrist-rolling display 20. Exercise mode: support running, cycling, walking, gymnastics, ball games, hiking, yoga, swimming, etc. 21. Reminder function: alarm clock, sedentary, drinking water, incoming calls, SMS, WeChat, Skype, Whatsapp, Facebook, Messenger, etc. 22. Other functions: Bluetooth call, watch direct dialing (must be connected to the mobile phone Bluetooth), music playback (must be connected to the mobile phone Bluetooth), stopwatch, timer, music control (connect to the APP, open the player on the mobile phone first), remote photo (connect to the APP, open inside the APP), weather, respiratory training, screen brightness adjustment, APP sports track, find watch, find mobile phone, etc. 23. Bottom case material: ABS + PC 24. Middle frame material: zinc alloy, vacuum plating 25. Face case material: glass 26. Wristband material: silicone 27. Strap: about 22cm long 28. Size: about 5.3 x 4 x 1.1cm 29. Weight: about 49g