1. Product features: The air pump and air bag are used to pressurize. The small pressure changes in the air bag caused by the fluctuation of the blood flow in the artery below the air bag are processed by the internal air pressure sensor to measure the blood pressure. It is also called oscillometric method. 2. Material: Zinc alloy+vacuum plating+PC+ABS+medical grade 316 stainless steel sheet+TPU strap/leather strap 3. Compatible system: Android 4.4 and above, iOS 8.2 and above 4. Processor (MCU main control): NORDIC 52832 5. Inflatable blood pressure measurement chip: BP006 oscillometric blood pressure function dedicated 6. Inflatable air pump: MAC20A micro piezoelectric pump 7. Body temperature sensor: CT1711 8. Photoelectric PPG analog front end (PPG AFE): HX3605 9. Blood oxygen sensor: PD: OSRAM SFH2703 10. Acceleration sensor: STK8321 3-axis sensor (G-SENSOR) 11. Display: 1.3-inch IPS high-definition screen, 240*240DPI 12. Battery capacity: pure cobalt lithium battery 240 mAh, 7-10 days of use, 30 days of standby (measured) 13. Bluetooth: 4.2BLE (low power consumption) 14. Charging interface: magnetic charging with short circuit protection 15. Charging time: 2-3 hours 16. The watch supports languages: Chinese, English, Traditional, Japanese, French, German, Italian, Spanish, Russian, Portuguese, Malay, Korean, Polish 17. APP supports languages: Chinese, Traditional, English, Japanese, German, Russian, Italian, French, Spanish, Portuguese, Thai, Czech, Greek, Polish, Vietnamese, Turkish, Romanian, Hungarian English, Danish, Finnish, Arabic, Ukrainian, Hebrew, Persian, Irish, Slovak, Norwegian, Korean, Croatian, Swedish 18. Main functions: precise air pump blood pressure measurement, independent precise blood oxygen measurement, precise body temperature measurement, real-time heart rate measurement, photoelectric automatic blood pressure measurement, sleep monitoring, respiration rate measurement, heart rate alarm, remote care for family and friends, multi-sport mode, exercise Measurement (step/calorie/distance), sedentary reminder, wrist lift to brighten the screen, anti-lost reminder, message push, incoming call reminder/rejection, mobile phone music control, 7-day scrolling storage of historical data, remote photography, WeChat sports synchronization, multi-dial switching, alarm clock, etc. 19. Watch size: 47x13.5mm 20. Strap size: 22x265mm