Technical Specification: Measurement Part: Wrist Measurement Method: Oscillometric with fuzzy method Display: LCD Digital Display Pressure Range: 0~300mmHg Measurement Range: Pressure 40~280mmHg(5.4~34.6KPa) Pulse: 30~160/minute Accuracy/Calibration:Pressure:-3mm~+3mmHg(-0.4~+0.4KPa)of reading Pulse: -5~+5% of reading Inflation: Automatic inflation by air pump Deflation: Automatic liner pressure deflation value Sensor: Semiconductor pressure sensor Power Supply: 3VDC (2 X AAA alkaline batteries) Battery Life: Approx 200 uses (alkaline batteries) Power Management: Turn off automatically when there is no operation for 3 minutes, low battery indicator Unit Weight: Approx 140 grams (not including batteries) Unit dimensions: Approx 75(l) X 75(w) X 65(h) mm Cuff Size: Wrist Circumference approx 140~195mm