This multipurpose device offers non-invasive blood pressure and proven pulse oximetry monitoring - in one compact, lightweight, user-friendly portable unit. Calibrate onsite with simple equipment and a flip of the switch - no need to send in for routine calibration. Measures blood oxygen saturation within +/- two digits and pulse rate within +/- one digit. Includes one standard cuff, fits arm circumferences 10-1/2" – 13-3/4" (27–35cm), 7.2v battery pack, battery charger and cord, connect hose, finger clip sensor, and instruction book.