Product Name: Arm Automatic Electronic Blood Pressure Monitor Without Voice Model NO.: JZ-254 Group: Middle-aged and Old Certification: CE, MSDS, ISO13485 Type: Blood Pressure Meter Classification: Physiological Functions of Diagnosis and Monitoring Equipment Trademark: OEM Transport Package: Color Box Specification: 105x130x60mm Origin: China Product Description Arm type digital blood pressure monitor:Display: LCD digital displayMeasurement Range: Pressure: 0-280 mmHg, Pulse: 40 to 180/minAccuracy/Calibration: Pressure:±3mmHg or 2% of reading Pulse:±5% of readingInflation: Automatic by electric pumpDeflation: Automatic pressure release valveRapid air release: Automatic exhaust valveMeasurement Method: Oscillometric methodPower Source:120V 60Hz Ac adapter or 4 "AA" batteriesBattery Life: Approx. 500 useds when used 6 times a day with 4 new alkaline batteriesOperating Temperature/Humidity: 50ºF to 104ºF (10ºC to 40ºC)/15 to 90%RHStorage Temperature/Humidity/Air pressure:-4ºF to 140ºF (-20ºC to 60ºC)/10 to 95%RH/860-1060hpaMain Unit weight: Approximately 370g not including batteriesCuff Size: Cull tube 64cmCuff circumference: 22 to 32cmMemory: Up to 90 per userContents: Main Unit, Regular size cuff, Instruction Manual