(LETS TAKE CARE OF OUR FAMILY)90 Sets of Memory, Easy One - Touch Operation, Average of last 3 readings, Automatic Power Off, Low Battery Indication. Specifications: Dimensions - 110mm(L) X 80mm(W)X52mm(H), Weight - 285 gms without batteries, Measuring method - Oscillometry, Measuring Range - 40 to 260mmHg for static pressure, +-5% of the reading for the pulse rate, Inflation - Automatic by Pump, Rapid Deflation - Automatic Electronic Valve, Batteries - 4 AA X 1, 5 V, Operating Temperature and Humidity - +10 degree celcius to + 40 degree celcius, 85% and below, Storage Temperature and Humidity - -20 degree celcius to 50 degree celcius, 85% and below, Upper Arm Circumference - 22- 32 cms.