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Measuring principle used by this device is Stethoscope. The measuring Location is Upper arm Cuff and has a limb circumference of 22-32 cms. The measuring range for pressure is 0 to 300 mmHg and that for pulse is 30 to 200 pulse/min. The device has a measuring accuracy of +/- 3 mmHg and pulse accuracy of +/- 5% of reading. The inflation is manual by latex bulb and deflation is manual by air release valve. The device uses power source 3 X AA Alkaline Batteries or USB type AC adapter. Its operation environment is +10(degrees)C to + 40(degrees)C.