Technical Parameters Product name: Arm type automatic electronic blood pressure monitor Display mode: LCD liquid crystal display Measurement method: oscillometric detection method Measuring range: Pressure: 0~280mmHg Pulse rate: 40 beats/min~199 beats/min Accuracy: Pressure: ±3mmHg Pulse rate: ±5% Power source: DC6V Normal working environment: temperature 5~40℃ humidity ≤80%RH Transportation and storage environment: humidity -20~55℃, humidity 10%~90%RH Measurable arm circumference: about 22cm~32cm Safety classification: Internal power supply type B Pressurization method: The pressurization adjustment method of the vibrating plate pump Quick exhaust mode: Open mode of extremely fast exhaust valve Pressure detection: semiconductor pressure sensor Pulse detection: semiconductor pressure sensor Package content: -1 x sphygmomanometer -1 x armband -1 x storage bag -1 x English user manual -1 x color box