<p> </p> <p>A small device that clips onto your finger &amp; uses light beams in a sensor to estimate the amount of oxygen in your blood without taking a blood sample. This helps to track and assess how well your lungs are working.</p> <p>Features:</p> <p>1. Accurate &amp; fast readings: consistent results that have been tested &amp; proven. The large digital display can quickly receive blood SpO2, pulse rate &amp; pulse intensity results.</p> <p>2. Graphic &amp; digital display: a simple bar graph to show your SpO2, pulse rate &amp; pulse intensity results.</p> <p>3. Suitable for all ages: The design allows fingers of various sizes to be held in the test area</p> <p>Specifications:</p> Blood oxygen saturation: 70% – 99% (± 2%) Pulse rate display: 30-240bpm (± 1bpm) Display mode: LED display Working current: ≤ 50mA Power supply: 2 x AAA batteries (Not included) Size: 57.8mm x 31.3mm x 35.9mm