Using the SE-7000: Place the cuff on the left upper arm. The cuff should not be too tight nor too loose.The measurement, inflating of cuff and the pressure reducing are automatic. Complete the measurement in a relaxed state, don't talk during the measurement arm and body has to be still. The main technical datas of the SE-7000 : Accuracy: ± 3 mmHg, pulse ± 5% Measuring range: between 20-280 mm Hg Heart Rate Monitor range: 40-200 pulsations / min "adaptive" optimal inflation features and automatic re-inflating and setting of the constant lowering speed of deflation depending on the heart rate Energy supply: 4 x 1.5V AA LR6 batteries or DC 6V power adapter type MEDAP Battery life: 3 months in daily use for about 3 minutes/day Memory: It stores 8 results of measurement Cuff size: 520 mm x 140 mm