Extremely compact and portable Fingertip pulse oximeter widely used by GPs, Hospitals, the Emergency Services, Nursing Homes and by individuals at home for on the spot readings. With trusted and proven technology and performance in SpO2 monitoring, the bestselling MD300 fingertip pulse oximeter can measure SpO2 and Pulse Rate quickly and accurately and is simple and convenient to use in almost every situation. With ambient light resistant, less than 1% deviation due to ambient light the MD300 pulse oximeter features 30 hours of continual use due to its low power consumption, automatic power off to save battery power and features a battery low indicator for indication of when to change the batteries. Complies with IEC60601-1-2 for electromagnetic compatibility Class B. The MD300 pulse oximeter comes complete with 2 AAA alkaline batteries, protective silicone sleeve providing shock-proof feature as well as a free carry pouch and belt loop. Suitable for adults, children and infants.