Accurate and Reliable Monitor This upper arm blood pressure monitor with advanced measurement technology gives you highly accurate readings. The accuracy ranges are: 3 mmHg / 0.4 kPa (blood pressure) and 5% (pulse rate). Recommended by doctors for home health and blood pressure monitoring and recording. Double User Mode * 99 Memory Storage This blood machine supports 2 users with their own measurement records, each user can record up to 99 readings. It automatically displays the average of your last 3 readings. Helps users to easily track their health, blood pressure, and heart rate according to the specific time and date. Adjustable Comfortable Cuff & Switchable Unit With a 22-32cm (8.7inch - 12.6in) large cuff, this blood pressure meter fits most people within the accepted range and has very strong velcro around the cuff to secure it around the arm, making it super easy and convenient for home use. Units of kPa and mmHg can be switched at will, suitable for everyone's reading habits. Fully Automatic Wrap the cuff around your upper arm, assume a proper sitting position, and get your readings on the large LCD screen with one touch of a button. Displayed measurements include: systolic pressure, diastolic pressure, pulse rate, date, time, and user ID. It will automatically shut down without any operation for 30 seconds.