This high quality Automatic Blood Pressure Monitor from LifeSource comes with an Extra large cuff to fit arms ranging from 16.5" - 23.6" (42-60cm). This extra large cuff size has never before been offered in home monitoring, but is available to you at a low cost here at Vitality Medical. An AC-powered high speed motor guarantees a fast and comfortable reading (AC Power Adapter Included) even with the increased cuff size. An Irregular Heartbeat Detection system is also integrated into the monitor and will provide blood pressure and pulse rate measurements even if an irregular heartbeat occurs. LifeSource's patented HeartWise Technology will measure blood pressure during the inflation process, and then will filter out any ambient or interfering noise upon deflation. A 60 slot memory recall will allow you to track up to sixty readings in your device, and with an included four week blood pressure logbook, you should be able to accurate see trends in your blood pressure over time. For added convenience an illuminated start button and an extra large display are built into the unit and a Trilingual instructions and quick start guide (English, French, Spanish) is provided.