Diagnostix™ 2100 Digital Fingertip Pulse Oximeter - A portable, battery-operated pulse oximeter for monitoring blood-oxygen and heart rate. The 2100 Digital Fingertip Pulse Oximeter is a simple non-invasive digital device that indirectly measures the oxygen saturation of a patient's blood (SPO2). The fingertip pulse oximeter digitally displays the percentage of SPO2 along with the patient’s pulse rate in 6 changeable display modes. Perfect for EMS, visiting nurse, or wherever portability is required. The Diagnostix™ 2100 Digital Fingertip Pulse Oximeter features: • Reads SPO2 and Pulse Rate. • 6 changeable display modes. • 10 Display brightness settings. • Visual and audible alarms (modes 2-6). • 25% smaller than competing models. • Bright OLED display. • Hinged battery cover is more secure. • Complete with Carry Lanyard and Black Rubberized Bumper. • 2 “AAA” batteries. • Instruction Booklet. • 2-year limited warranty.