QARDIO QardioArm Wireless Blood Pressure Monitor - Arctic White Cuff Type: Upper Arm Operation Mode: Automatic Features: Measures your systolic and diastolic blood pressure and heart rate Cuff Circumference: 8.7-14.6 in circumference (22-37cm) Measurement Method: Oscillometric method with automatic inflation and controlled pressure release valve Measurement Range: 40-250 mm Hg for blood pressure 40-200 beats/min for pulse Measurement Accuracy: 1mm Hg for blood pressure 1 beat/min for pulse Power Source: 4 x AAA Battery