Multifunctional pulse oximeter adopts photoelectric oxyhemoglobin inspection technology, integrated with capacity pulse scanning & recording technology, used to measure human oxygen saturation and pulse rate through finger, very suitable for family, oxygen bar, community healthcare, physical care in sports, etc. Features: Fast & Precise Measuring: Instantly, accurately test SpO2 (blood oxygen saturation), pulse rate(PR) & perfusion index(PI), display the measurements on large color screen. Rotatable Screen & Adjustable Brightness: Automatically rotate screen(total 4 direction), with gravity sensor; long press on the button to control screen brightness level. Easy Carry: Fingertip pulse oximeter, with lanyard, lightweight, mini, compact, portable, space-saving at home and convenient to anywhere. Auto Stand-by: Just clip it on to the finger for 2s to use; with taking out the finger, not working for 5 seconds, enter standby mode for saving energy. Well-Made Oximeter: Solid durable ABS