Jitron Digital Arm Blood Pressure Monitor JBPM-903A Comes with large size cuff. Measuring Range: 30~280 mmHg, 40~199 beats/min Calibration Accuracy: Blood Pressure: ± 3 mmHg, Pulse Rate: ± 4% of reading Operating environment:10°C~40°C (50°F~104°F), with relative humidity up to 85%...