Features simply slide on the arm cuff (22cm-32cm) and turn on the device the blood pressure monitor will automatically start to charge for measurement. INTELLISENSE TECHNOLOGY - This blood pressure monitor always inflates the cuff to the peak pressure that is tailored to your own blood pressure level, ensuring a more comfortable and accurate measurement. HIGHLY ACCURATE MULTI READINGS - This Blood pressure monitor measures systolic, diastolic, pulse and heartbeat all displayed clearly on the digital liquid crystal display which is easy to read and understand. 99 SETS OF STORAGE MEMORY - The blood pressure monitor can store up to 99 groups of memory. After each measurement the blood pressure monitor will automatically store measured data. When the memory button is pressed it will first show a ROLLING AVERAGE of the last 3 readings, The measured value of EACH INDIVIDUAL test can be shown by pressing the button in sequence. EASY TO FUNCTION - Quick, comfortable and accurate readings, just how it should be! Specifications: Material: Plastic Color: White Size (not include cuff): Approx. 9.8 x 11.5 x 6cm/ 3.85 x 4.52 x 2.36 inch (L x W x H). Display: LCD digital display Measuring principle: Oscillometric method Measuring localization: Upper arm Cuff range:22-32cm Measuring accuracy: Pressure: 3mmHg; Pulse: 5% of reading Resolution: 1mmHg (0.1kPa) Measuring range: Pressure: 0 to 280mmHg; Pulse: 40 to 199 pulses/min Memory function: 2 x 120 sets memory of measurement values Inflation: Automatic by micro air pump Deflation: Active electronic control valve Power source: 4 X AAA batteries (Not included), USB 5V (Not included), Automatic power off: about 2 minutes