Features: 1) Indicator: 9 digits LCD display 2) Measuring range: 0 - 255mmHg (cuff pressure), 40 - 160 pulses/min (pulse rate) 3) Accuracy: ¡À3mmHg (cuff pressure), ¡À5% of reading (pulse rate) 4) Inflation: automatic inflation (air pump) 5) Deflation: electric control valve 6) Exhaust: automatic exhaust valve 7) Power supply: 2 AAA batteries 8) Memory: 96 measurement results 9) Operating temperature: +10 - +40oC (+50 - +104oF) 10) Storage temperature: -20 - +50oC (-4 - +122oF) 11) Humidity: 85%Rh or below 12) Cuff: hard cuff (5-1/4 inches - 7-3/4 inches) 13) Wrist circumference: 135 - 195mm 14) Main unit dimensions (W x D x H): 63 x 65 x 22mm 15) Weight: 112g (including batteries)