Works very good . The small finger tip sensors never works for me.

We use this to monitor my wife's oxygen saturation every night. Last summer, we ordered it and tried it simultaneously with the one provided to my wife in the hospital. The hospital model was a battery-powered Japanese brand item designed for pediatrics. I checked and found that that hospital unit would have cost $1200 plus batteries. By comparison, this CMI rechargeable unit is a steal. The readings were comparable between the CMI unit and the expensive hospital unit. While at the hospital, we used the CMI unit disconnected from AC several different nights. It ran for 8-9 hours each time (starting from a full charge).At home, we leave it plugged in all the time. It really helps, every night, by giving peace of mind that the alarm will sound if/when the oxygen saturation goes below the cutoff level that we set.I will address several issues mentioned in other reviews:(1) The tone sounds by default when the unit is powered up. It must be deactivated within a few seconds of placing a finger into the pulse ox sensor.(2) When the alarm sounds as O2 saturation falls below your cutoff setting, the pitch of the tone will indicate whether the O2 saturation is continuing to fall (lowering pitch), holding (unchanging pitch) or rising (rising pitch).(3) The alarm can be deactivated for only 90 seconds at a time, unless O2 saturation levels remain above the cutoff. If levels remain below the cutoff, the alarm will come back on again after 90 seconds. (Or, if it rises above the cutoff and then falls back down below, it will immediately activate the alarm again. This is super helpful, as it will eventually stir you to action even if you sleep deprived and somehow have instinctively deactivated the alarm and fallen asleep several times in a row - which will happen if you are worn out from waking up multiple times to try to get the situation fixed.(4) One previous reviewer said that the unit quit working after the first time. Firstly, to turn it back on requires a long press (and then release) on the power button. This almost always works. Sometimes I have to unplug the cord from the jack at the top of the unit and re-plug it (while the AC adapter is plugged into a power source). I have always been able to get the unit powered up so far (have been using it nightly for over 8 months).(5) Some have complained about the cords. We have a power strip, into which we can plug the AC adapter, at the head of our bed. We keep the yellow case on the bed where one or the other of us can glance at it if needed. Also, we want it to be within reach of both of us, in case we need to temporarily silence the alarm. The finger clip with the sensor is on a fairly long and light cord. Thus, there is no problem finding a comfortable position for clipping the sensor on the finger.(6) The finger clip is more comfortable than the typical portable, one-piece pulse oximeter. That said, we have found a bit more comfort and no loss of functionality from sticking the oval pads (with holes in the center) used for cushioning foot corns. As long as the center hole in the corn cushion is positioned so as not to block the red light, the sensor works fine. Also, a single corn cushion need not be replaced for weeks.Again, we are super grateful for this device. It allows us to monitor oxygen saturation all night long, and sleep peacefully as long as levels are maintained. That is all of the functionality we need. We have not attempted to use the logs, so I cannot comment on that functionality, though I can see that logs are being created and saved as we use the device.

This pulse ox meter is excellent. Cant get any more professional than this one. It’s accurate every time. Very good purchase.

This is my third monitor.My first monitor I damaged it by trying to insert the charging cable in to the data download port, I did it several times untill damage was done.The second, I left the charging cable on the device, so I will not try to insert it in the data port, but with time, maybe a couple of years I damaged the unit and battery.Now the device performance.I have chronic obstructive pulmonary disease, A fib and other heart problems, so I set up de devise to sound the alarm when my oxigen is below 82% and my heart beat are below 40 beats or above120 per minute. Sometimes the low oxgen weak me up or my low/high beats per minute wake me up.So here you have it, my sincere review.I will buy another If needed.

This is the 2nd one I bought but it did not have both finger monitors in it like the first one. The 1st one had a child finger monitor and the flat rubber adult one that was harder to dislodge while sleeping. Not as pictured.

Looking for a monitor that would set off an alarm if oxygen was low. It was also very accurate.This worked for us. Our Mother had copd and lung cancer. She would pull her oxygen off at night leading to a dangerous drop in her oxygen level. We could finally rest at night knowing we would be alerted if her oxygen dropped. Now, the person must wear the lead that goes on the finger for it to work. She was known to pull it off occasionally, this could be a drawback.Our Mother has passed so I don't know how long the device would last but it wasa very valuable tool for us in her last days especially.

Very Good Quality! I was excited and I need to calm down myself!

This is an excellent pulse oximeter. It sets up easily and gives clear, easy-to-read readings in a well-designed color display. The options menu allows some customization including whether the meter stores your data for later readout. (I chose to not use that feature.)It is more expensive than many options but the build quality is extremely high and it is claimed to be a clinical-grade instrument. It seems that way.I wanted the non-rechargeable battery version but it was out of stock so I bought this rechargeable version. It works fine. A few hours to charge the battery. And the oximeter can be used while the battery is charging from the included charger.One odd aspect is that the charger plugs into the top of the meter. First time I've seen that. But it doesn't get in the way. One minor nuisance - there is a beep whose volume can be adjusted but not disabled. There is a temporary mute button on the front panel that I use every time I turn on the meter.Overall I am very pleased with this unit and recommend it without hesitation.