Digital Talking Blood Pressure Monitor With Back Light Product Description Fully Automatic Arm Style Electronic Blood Pressure Monitor Talking With Back Light Display Digital Liquid Crystal Display Measurement Mode Oscillometric Method Measurement Range Pressure: 0mmHg-299mmHg Pulse: 40-200 times/min Accuracy Static Pressure: +/-0.4kPa(+/-3mmHg) Pulse: +/-5% Resolution 0.1kPa(1mmHg) Power Supply DC 6V (1.5 four AA Batteries) Storage Temperature And Moisture : Temperature -20 Deg. C - 55 Deg. C Moisture: