The oximeter measures quickly and accurately your pulse rate and SpO2 blood oxygen saturation of arterial hemoglobin levels, or in laymen terms, the oxygen level in your blood. Mine was too low. WAY too low. I sat in the treatment room with an oxygen mask on for a while. With the mask on my levels were good, but as soon as I took it off, they dropped again. Too low for the doctor to allow me to travel to the hospital without oxygen, hence the ambulance ride. I ended up being diagnosed with pneumonia.
While at the hospital (and at the doctor's office), I could find out what my oxygen level was. When home, though, I couldn't, and there were times where I wondered if I needed to go back to the emergency room. Had I owned one of these devices, I would have known for sure.
The device works as its supposed to, assuming the levels are coming across correctly. It is a cinch to use. Just gently place it on your finger and wait. The reading is clear as day. The bright display shows your pulse rate with the strength of your pulse as a Pulse Rate Plesthymograph wave, along with your SpO2 level and the device's battery level. The batteries should last a long time as it auto shuts down after 8 seconds. It runs off of 2 AAA batteries if you do need to replace.
This is a great device to keep around the house. It wouldn't have kept me from the ride in the ambulance, but it is fantastic for peace of mind, especially if anyone in your family suffers from breathing issues like asthma.
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