The Arm Blood Pressure Monitor adopts one-button measurement technology which is easy to operate, just click the "Start/Stop" button to measure blood pressure, simple and convenient. This blood pressure monitor can monitor 2 users together, 90 use memory helps users easily track their health, blood pressure and heart rate. Widely Adjustable and Comfortable Cuff: The cuff can fit upper arm circumference of 22-42 cm (8.7 16.5 inch), suitable for people of all sizes. The large cuff offers nice touch and will be comfortable around your arm. With backlight design, you can read it clearly even in the dark. Adjustable voice makes the blood pressure monitor convenient for different user needs. Specifications Power supply: DC 6V, 4*AAA batteries (not include) Type-c power supply: DC 5V, 1A Measurement Method: Oscillographic mode Measurement range: Pressure: 0~39kPa (0~290mmHg) Pulse value: (40~199) Times/min Accuracy: Pressure: 0.4kPa (3mmHg), Pulse value: 5% Memory: 2X90 Operate Condition: Temperatures: 5& 8451;~40& 8451;; RH: 15%~80%; Pressure: (70~106)kPa Storage& transportation Condition: Temperatures: -20& 8451;~50& 8451;; RH: 15%~93%; Pressure: (70~106)kPa Weight: About 276g Production Dimension: 109*137*82mm Arm circumference: 22-42cm Include 1* Blood Pressure Machine 1* Arm Cuff 1* User manual