The FDA approved MD300C2 is intended for noninvasive measuring of the oxygen saturation in the arterial hemoglobin. Appropriate for adult and pediatric environments. This model can be used in clinics, hospitals, emergency medical services, home care, and aviation applications. Featuring a two color OLED display, measuring 58 x 32 x 34 mm and weighing a mere 50 grams (including batteries) this is the perfect finger pulse oximeter. Heart Rate: 30-254 bpm ±2 bpm. SPO2: 35%-99%.
Long story short, you can measure the amount of your blood oxygen levels.