The UA-774AC Dual Memory Auto-Inflate is an innovative monitor that incorporates digital blood pressure technology and advanced features in a simple design. Keeping track of blood pressure readings for the entire family can now be done with just one monitor. This monitor provides individual and average blood pressure readings for two people. A guest mode is also included for others to obtain their readings. This unique monitor is equipped with two illuminated start buttons- one for each user- and each button can store up to 30 readings (each with their own average reading feature) for a total of 60 measurements It has been clinically validated for accuracy (+/- 3mmHg and Pulse +/- 5%), so you can be confident that your readings are consistently correct. The measurement range is 20 mmHg to 280 mmHg and Pulse: 40 to 200 pulses/minute. Also included is an Irregular Heartbeat Feature that alerts the user and provides an accurate measurement even when an irregular heartbeat occurs. To obtain an accurate reading, it is important to use the correct cuff size. A cuff that is too small will result in a higher than expected reading and a cuff that is too large will result in a lower than expected reading. The UA-774AC includes both medium (7.5" to 12.2") and large (11.8" to 17.7") arm cuff sizes. Also included are an AC adapter, trilingual instruction manual, quick start card, four week blood pressure logbook, 4 "AA" batteries and a warranty card. Both the monitor and the cuff contain a Lifetime warranty and is supported by a consumer friendly Customer Service Dept. which can be contacted at 1-888-726-9966.