Suitable for home or outdoor use: Clinically measured blood pressure monitor, suitable for home or outdoor use, easy to take accurate readings. Range of measurement: pressure measurement range from 0 to 280 mmHg (OKPA to 37.3 kPa) and pulse measurement range from 40 to 199 beats/min. High efficiency measurement: powered by 2 batteries AAA, high sensitivity and fast response for high efficiency measurement. Usage: Wrap the tester around the inner side of the left wrist and stick the extra pieces on the wristband from bottom to top. Place the wristband at a distance of 10~15mm / 0.4~0.6in from palm to wrist Tips: When measuring your blood pressure, be sure to keep it at the same height as your heart. To ensure the accuracy of measurement results.