CONTECCMS50F Wrist-worn Pulse Oximeter with Software and Download Cable

I ordered this with reservations after reading some of the reviews, but I have found the unit to be easy to use and to function as advertised. My experience with issues identified by others:1. Programing the unit - I found the unit to be fairly easy to set up and navigate through the menu. The key is to read and follow the directions the first few times you use it. After a few times it is pretty intuitive. ( Note: As my grand daughters remind me I am "very, very old". I am not a young computer whizz.)2. Short battery life - The first few times I used it the rechargeable battery seemed to take a long time to fully charge and then drained very quickly. I found that after going through a few charge/discharge cycles these problems went away. Now I just charge it for 1-2 hours before each nightly use and wake in the morning with plenty of power left.3. Analyzing results - The included analysis software is fantastic for visualizing and summarizing results. But this is the part which took the most time to learn ( I waited a few weeks before even trying). In fact it went better than I expected - I didn't even have to call my son-in-law. It took a few attempts to get the mini-CD to fit into my computer DVD slot. But once I got the CD lined up installation of the program was no problem. Running the program was mostly trial and error (instructions were not real clear). Sequence is important. Follow this order: a) Open the program. b) Connect wrist unit to computer with supplied USB cable. c) Turn on wrist unit. d) From the computer program menu, download recorded data from wrist unit to computer. e) Open the desired downloaded data file in the computer program and view results ( Note: To download data from the wrist unit to the computer you must have been previously saved it in the wrist unit using the Record mode from the wrist unit menu. And each time you start a new Record session you will erase the previous data set. But that doesn't matter because if you have downloaded it, it is saved in your computer.Hope this helps people who may be experiencing problems - or are debating whether to purchase. I highly recommend.

The watch part worked fine and was easy to use. It's not the smoothest piece of hardware but it's not too difficult to figure out.Connecting the watch to the computer was a major pain in the ass. I tried 2 computers but could only get it to connect sporadically a few times. I followed a bunch of tips on the apnea board but I just couldn't get it to connect consistently.

This product works well monitoring my sleep. It monitors blood oxygen level and heart rate constantly through the night. In the morning I plug the unit in to my Windows based PC and use the software which came in the box to create very informative reports(No Mac Software Available). The other nice feature is the alarm function. You can set your own parameters for 02 level and heart rate both high and low. If any user programmed parameters are exceeded the unit will sound an audible alarm to wake you up. The instructions are bad but this link help me get started. [...]This unit has no bluetooth capability but there is a sister unit available that does, CMS-50FW is the model number.The bluetooth model is capable of real time remote monitoring of all information on a PC within bluetooth range. The live read out almost looks like what you see in a hospital. It also can be programmed to alarm. I presume you can also transfer data without a USB connection. I Have found that a piece of tape or a band-aide around the lower part of the finger unit helps keep it from slipping off or moving while sleeping and can provide more accurate readings.

I purchased the CMS 50F so In could monitor my breathing for sleep apnea prior to having a formal sleep study. I previously owned a SPO Medical Pulse Ox 7500 about 10 years ago for the same purpose. My Pulse Ox 7500 became intermittant so I needed a new reliable one which offered overnight recording downloadable to a PC with acceptable software and report generation. The CMS 50F is ok but marginal. The plastic wristband does not easily allow pulling it onto ones wrist over the hand and then tighten such that its sleeping wearable. Its clumsy but usable. The human interface requires single and double clicking in non-intuitive menus/clock/readout which is not easy at night while wearing it. But is doable with some contortions. Once its on and its on a finger thats comfortable ( plastic is stiff and makes my finger go numb ), powered on, charged via charger or PC USB port, and the record option selected and "yes" selected, its ready to go.If I wake and need to get up, it typically losses synch which appears as an "event" which must be ignored if you recall what time you got up. Then in the morning, when its time to get up, the record needs to be turned off and the power turned off to save battery charge unless one goes uploads to the PC immediately. Loading the software on Windows 7 was a bit tricky but I read various online forums and somehow got it to work and after loading the special driver. It wasn't exactly turnkey. In my online forum searches, I saw where many people never got the software working so beware.Once the software and its driver is working, the CMS 50F is plugged into a mini-USB which is plugged into a PC USB. Then on the main software SpO2 Assistant, the DB9 looking button is clicked on. That brings up a list of connected units ( if you are lucky) and the one is selected where mine says COM4 50F. If its there and selected, push the connect button. It should begin displaying real time data for the unit. Then select "Device Stored Data" under "file" and select user data and "recieve data". Look at the last few digits on the file its receving so you can find it under "Query User Data" which you click. If all that works, you can then enter your name, age, sex, height, weight, and Nationality and "save". Then one can choose between various reports under the "report" pulldown.The one major issue is there is no way to know if its accurate. If it shows 97-99% when you are breathing normally, thats probably correct. But there is no way no know if a reading of 90% or 80% or 70% is real on the report. For example, it it shows say 92% during what appears to be an apnea event, but its really 70%, that's a catostrophic error with no way to test it besides buying another suppliers unit and wearing both and cross check them. If you are led to believe your O2 saturation is say 93% during events, but its reall 73%, it could be a fatal mistake because you now believe you have minor desaturation while in fact its dangerous.Try downloading a snoring APP to your phone and see if the events correllate in time with snoring events. Otherwise buyer beware without any way to know or calibrate the lowest readings.Good Luck Flying by the seat of your pants....