33 of 33 people found the following review helpful
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This review is from: AVAX 50DL - Finger Pulse Oximeter - %SpO2 (Blood Oxygen Saturation) & Heart Rate Monitor with Instructions, Lanyard & Carry Case (in RETAIL PACKAGING) - BLUE (Electronics)
This was purchased to monitor the oxygen levels for someone permanently on oxygen. They are really easy to use. The instructions have been translated - so enjoy the language used. We managed to test it against the ones used by the staff in the hospital - turned out to be quite accurate on the Sp02 value (+1). These clever devices shine a "light" through your finger and measure the absorption - so anything on your nail (e.g. nail varnish) will cause them problems.