The Microlife A2 Classic allows you to measure your blood pressure at home comfortably and accurately. The reading can be easily classified using the blood pressure threshold indicator. A2 Classic records up to 30 measured values and is equipped with PAD technology for early heart rhythm recognition. In addition, the device is supplied with an M-L-cuff that covers most arm circumferences. Specifications Dimensions: 120 x 87 x 59 mm Weight: 375 g (including batteries) Source voltage: 4 x 1.5 V batteries ; size AA or DC 6V, 600 mA (optional) Measurement range: 20 – 280 mmHg (blood pressure) 40 – 200 beats (pulse) per minute. All Microlife blood pressure monitoring was clinically tested for specific groups of patients such as diabetes, end-stage renal disease, pregnancy and pre-eclampsia, hypotension, and children (from age 13). Guarantee: 5 years on the machine, 2 years on cuff