display LCD digital display 78 x 70 mm mesuring principle oscillometric method mesuring localization upper arm mesurement range pressure 0 - 299mmHg pulse 40 - 199 pulse /min accuracy pressure 3mmHg pulse 5% of Reading LCD Indication pressure 3 digit display of mmHg pulse 3 digit display of mmHg Symbol memory/Heartbeat/Low Battery Memory 2*120 Sets memory of mesurement value power source 4pcs AA alkline battery DC 6V or AC adaptor Automatic power off in 3 mins main unit weight 311 gms approx main unit size L125mm x W91mm X H56mm Main unit lifetime 10000 times under normal use battery life 300 times cuff size : 22 - 32 cms air pressure 86kPa - 106kPa