PERFECT MEASURE? Blue Jay Automatic Blood Pressure Monitor With X-Large Cuffs For users with larger arms Cuff fits arms 12.6 - 20.5 in circumference Includes X-Large arm cuff 4 AA batteries and free bonus travel pouch 3 Year Warranty Large high performance motor easily inflates x-large cuff for fast and accurate readings Digital LCD display WHO classification indicator 90 memories Automatic power off Irregular heartbeat detector Average of last 3 measurements Micro USB power port allows unit to be powered with any USB port including a laptop - great for travel! (cable not included) Unit weight: approx. 230g (not including batteries) Unit dimensions: 5.1 L x 3.9 W x 2.5 H Measurement range: Pressure (0 mmHg-280 mmHg) Pulse (30-160 bpm) Measurement accuracy: Pressure (ñ3 mmHg) Pulse (ñ5% of readings) Cuff measures 26.8 x 5.5 and fits arm circumferences 12.6 - 20.5