But what I can write is that installation and operation are easy and the manual is very detailed - albeit translated in English and in Chinese, that sounds partially bumpy, but a point deduction. The manufacturer, however, for example, clear instructions as "NEVER IGNORE THE ALARM!" and provides a list of symptoms of CO poisoning.
Please read installation instructions carefully, there are "dead zones" in the house in which the sensor does not work (either because too much or too little air flow prevails). Again: well thought along by the manufacturer, apparently are here before experience.
