The Advantage Plus Automatic Digital BP Monitor is an upper arm digital blood pressure monitor, ideal to use at home. It measures systolic, diastolic pressure and pulse. Smart Logic Technology makes setup easy by determining the ideal inflation level. MAM Advantage Average mode automatically averages 3 readings for superior reporting accuracy. AM and PM readings are displayed separately to help detect morning hypertension. This device features an irregular heartbeat indicator, automatic inflation and deflation control, and a 99-reading memory with date and time stamp indicators. A wide range cuff fits arms 8.7" to 16.5" in size. Use this device with the optional PC Link Analyzer Software (sold separately) to download and analyze blood pressure readings. This blood pressure monitor works using 4 "AA" batteries and has an auto-off setting to conserve battery life.