Ever wonder why every time you go to the doctor they put one of these on your finger? Pulse oximeter measurement is rapidly becoming accepted as a "fifth vital sign" in addition to temperature, blood pressure, pulse and respiratory rate in clinical assessment.

• Measures the oxygen saturation of arterial hemoglobin and pulse rate
• Red LED display shows your results at the press of a button
• 2 'AAA' batteries included
• 1.3" x 1.2" x 2.6"
• 1-year limited warranty