CO detectors work properly

I have a weekend house with a warm air heating. According to newspaper reports with the deaths because of a defective heating I was terrified that something like this can happen to me. Now I feel safe. The device displays on a display whether an increased CO concentration is and there is a loud warning sound in case of danger. It is simply attached at eye level on the wall. It has an LED that indicates a that it is ready for use. It even has a memory function, with which you can check if in between times was an increased value. So awesome for someone who is afraid that his heating something might be wrong. Or even for someone who just wants to be on the safe side always only. Definitely ideal for these hookahs cafes, where there were so many victims lately. After 7 years, incidentally conclusion. Then the device was probably something like an auto shutdown, because then no longer be guaranteed for a reliable function.
With the delivery of everything was very great with me. Even without rush charges occurred the next day, directly by regular mail.