The accuracy of the oxygen monitor can reach plus or minus 2%.
AILE Pulse Oximeter Oxygen Meter Adults Accurate Fast Easy Larger Red Screen Oxygen Monitor with Lanyard Blood Saturation Monitor -O2 Saturation Meter Pulse-Oximeter
AILE Pulse Oximeter Oxygen Meter Accurate Fast O2 Saturation Monitor Red Screen
AILE Pulse Oximeter Fingertip Blood Oxygen Monitor SpO2 Meter LED Adult
AILE Pulse Oximeter Fingertip Blood Oxygen Monitor SpO2 Meter LED Adult White
Children Fingertip Pulse Oximeter, Oxygen Monitor for Kids Baby and Blood Oxygen Saturation Heart Rate Monitor with Automatic Shut-Down, SPO2 Pulse Oximeter, Rechargeable via USB (Yellow)
