Basically, I can associate myself with the positive reviews of other users. We use the device as an emergency reserve to our major "official" unit, at our home ventilated Kind.Da monitoring is constantly required, especially in the bedroom, it was always awkward to have only one Pulsoxy - falls off the device, then actually remains only the way to the hospital - and there really just to Intesiv. For a long time we were looking for an affordable alternative to bridge these cases the time to delivery of a replacement device can. For this purpose it had to 1) an audible alarm and 2) provide individually adjustable alarm limits and 3) a long-term monitoring can be provided. The presented article was the first "tiny", which enabled these points. Critical to note the following points: 1) it would be useful to provide a small sleeve that enables storing of the unit in your pocket without that the device switches on and as a result the battery is empty, if necessary. The big box including all cables is too big for this. 2) and this is the important point: The acoustic alarm will turn off very quickly when the device from slipping from his fingers. This function should be deactivated. Of course, it is useful in measuring the sampling area (machine off, with a nice "bye bye" to save Automatic shut off to battery), but at a long-term monitoring even during sleep, if you have to rely on the fact that an acoustic alarm comes (other situations in which the monitoring should be a little looser), in this case, the adjusted solution is extremely dangerous. It is based on a monitoring of the patient, even though the device ev. Is turned off! As much as I want to give in all other respects a "very good", here is the device "unsatisfactory" and dangerous.