Name: Fully Automatic Electronic Wrist Blood Pressure MonitorDisplay Mode: LCD LCDMeasurement method: ripple detection methodMeasurement range: pressure: 0~280mmhg pulse count: 40 times/min~199 times/minAccuracy: pressure: 3mmhg pulse count: 5%Power supply: 2 size 7 batteriesNormal operating environment: Temperature 5 ~ 40 humidity 80% RHTransportation and preservation environment: humidity - 20 ~ 55 humidity 10% ~ 90% RHWeight: about 200 grams< /p>External dimension (main unit): 73mm length * 70mm width * 32mm heightSafety classification: type B internal power supplyPressurization method: vibrating plate pump pressure adjustment methodQuick exhaust method: extremely fast exhaust valve open methodPressure sensing: solid state pressure sensorPulse sensing: solid state pressure sensor semiconductor