I still have it after a decade. It works well and very good.

I bought 2 of these, 2 different brands. I like this one it works pretty good, just a bit loose on finger, most fit snugger. Would get 5 stars if it fit bit snugger, but that doesn't seem to make any difference with how it works

if u have nails then it won’t fit your finger in, and won’t work

Seems to work well. Very easy to use. Light. Compact. Hope it's as accurate as the reviews say.

Bought after checking reviews of this model online (from medical personnel). So far, seems to be accurate and working well. Purchased to potentially check effectiveness of oxygen administration in diving emergencies.

Acquistato come precauzione in più per tenere sotto controllo comodamente a casa i parametri di salute, vista l'incidenza del coronavirus sui livelli di ossigeno nel sangue. Misura anche le pulsazioni, il tutto in pochi secondi. Logicamente non è uno strumento che garantisce una diagnosi assoluta e completa, ma nel suo piccolo può dare qualche informazione immediata sul proprio stato di salute in modo comodo e veloce.

Funcional, rápido, portable y económico,He acudido a congresos médicos y este tipo de oximetros los llegan a vender casi por el doble del precio de lo que pagué por el.Es bastante confiable, he tenido la oportunidad de compararlo contra otros oximetros de pulso tanto portables como los de calidad médica que se conectan al monitor y no existe mucha variabilidad en n cuanto a los niveles que marca,Si tienes dudas y piensas que pronto irás a un congreso, que es posible que encuentres mejores precios... deja de creer eso y hazte con el tuyo

Out of the box:- Packaging appears sufficient. Unit come with 2 AAA batteries (non-alkaline?).- Carrying case is included with velcro closure which is nice. A lanyard is also included which was immediately upcycled into a cat toy.- The display is in the opposite orientation of the person using it (up-side-down) which makes it a little difficult for self-administered testing as you are to remain still for optimum test results.*NOTE: I recommend disposing of the supplied batteries as they do not appear to be alkaline or better. These batteries are known for low expected battery life cycle and leaking over time and especially with infrequent use. Battery acid can significantly harm electronic components and insulation resulting in premature circuit failure.Operation:- Simple and straight forward, put finger in and go.- Unit will self-power down after a few idle seconds.Accuracy:- Appears to function as advertised. I am going to compare with medical grade equipment and update my review accordingly.UPDATE: compared to hospital equipment, values were within about 1% during 8 minute comparison. I did note that the refresh rate in this unit was actually faster than the professional unit...impressed!Long Term Reliability:- Initial impression based on the visible components and attributes used: - Cover appears to be snap-fit or perhaps sonic welded. - Wires used to connect bottom sensor to logic board in top half are wrapped in tubing and are sightly exposed in the rear of the unit. It is unclear if there is any strain relief on these wires. There is a slight risk of wire continuity failure due to flexure of wires during normal operation (open/ close finger clamp).- Both labeling and device serial number are laser etched. This is a pricey process when compared to standard poly labels and is indicative of an advanced manufacturing facility.- Device is made in China by Contec, an FDA registered company (Reg# 3006979678) whom also make EKG machines and other sophisticated medical devices.Overall Risk for LTR= Low for average consumer usage, LOW-MEDIUM for regular/ vigorous use due to possible wire flexure failure.- Demonstrated LTR is pending use.Overall Verdict:- Good for the average Joe/ Jane and can't beat the price.

I decided to take a chance and buy the cheapest one on Amazon. I'm an ophthalmologist and performed 34 cataract surgeries today. I asked my preop staff as well as the nurse anesthetists to directly compare this new unit to our preexisting, expensive medical quality units on patients all during the day. Whether at the high range (97-100% saturation), mid range, or lower range (as low as 83% saturation) there was excellent correlation between the units. And the CMS 50DL actually responded FASTER to rapidly changing conditions than our expensive models. We were all shaking our heads in amazement by the end of the day. I bought it so that my son and I can fly our small plane over the Rocky Mountains this summer on oxygen and make sure we're not hypoxic. This lightweight, accurate fingertip unit will be perfect for our needs.Update: Flew my plane at 14,000 feet with a bottle of oxygen last weekend. The pulse oximeter did very well with a fast response time. Helped me discover my blood oxygen had fallen to 84% saturation before I started breathing oxygen. I'm still VERY happy with this unit.Second update: 9/5/14 After two summers of flying across the Rockies the unit is still in perfect working order. I can't say I use it very often, but when I do it's still 100% dependable and reliable.

This product is very easy to use. You slip it over your finger, tap the white on button and a small amount of light is emitted on top of your finger. This allows the meter to measure the amount of oxygen in your blood and your pulse. The mechanism of how this unit works in the same as a professional meter. The main difference I can find is that you cannot keep a recording of your blood oxygen or pulse. If you do not need an automatic recording, this is an excellent meter.The Pros1. It is very lightweight.2. It is small enough to carry from place to place. It is a little larger than a string cheese stick folded over (see photo).3. The on button is small but the white color against the blue background makes it easy to see. It is also raised so that any pressure in the general area will turn it on (see photo).4. The read-out numbers are large, 1/2 inch by 1/2 inch by measure which is about the equivalent of 20 point font (see photo).5. It is easy to use in low light or at night since the meter shows the results in red light on a black background (see photo).6. It takes the reading quickly, about 15 to 30 seconds.7. The colors are good. The top and bottom are dark blue (darker than the Amazon picture) and the sides are white. When I want to be able to see it easily I turn it on its side so that the white shows. If I want to be more discrete, I turn it so the blue shows.8. It runs a long time before the batteries need to be changed.9. I made a major whoops in the kitchen and bounced it off of a granite counter top and then onto a wood floor. The spring gave way a bit but I was able to put it back together. Even though I had to put it back together I was surprised that I had not broken it.Cons--these are not significant but I believe worth knowing about.1. If you are reading the numbers on someone else, they are right side up. If you are reading them for yourself you have to learn to read upside down or turn your finger toward yourself like you would to examine your fingernail. Most of the time I can read the numbers upside down but sometimes I get confused so I just turn my finger toward me. You cannot take it off and then read the numbers since it turns off immediately.2. The battery cover is pretty hard to get off. The location is good but on mine the ridges that you push to move the cover are not very deep. It takes a good amount of pressure to get it open. If your hands are like mine and not as strong as they used to be, you might want to have someone change the battery for you.3. Sometimes you have to give it an extra 15 to 30 seconds to stabilize the reading.I would recommend this meter to anyone. I think that it would be easy to use even with coordination or finger dexterity challenges. If your dexterity is not strong, I think you could use it fine but might want to have someone change the battery for you. I have not specifically tested the meter against a professional one but I do know that the readings it gives me are consistent with what I expect from past experience using a professional meter. Of course, every person is different and a health professional can help you determine what is right for you.