[AUTOMATIC UPPER ARM MEASUREMENT] This automatic upper arm blood pressure monitor completes each measurement on its own and displays systolic pressure, diastolic pressure, and pulse on one screen. [LARGE CUFF — FITS ARMS 8.7–16.5 IN] The adjustable upper arm cuff fits arm circumferences of 8.7–16.5 inches (approximately 22–42 cm). Measure your upper arm before ordering, then position the cuff as directed in the instructions. [ONE-TOUCH OPERATION, LARGE DISPLAY] Start with one touch — this blood pressure machine inflates, measures, and shows results automatically. The large digital display presents your numbers in big, clear digits for easy everyday reading. [2 USERS × 99 READINGS EACH] Dual-user memory stores 99 readings per user, 198 in total, with date and time information. Select your user setting before measuring, then review past readings whenever you need them. [4 AAA BATTERIES + EXTERNAL POWER OPTION] Runs on 4 AAA batteries; an external power option is also supported. Compact and lightweight at 13.4 ounces (5.5 × 3.8 × 2.7 inches) for home use and travel.