Solid housing at the Bavaria BACM5 CO detector is made of plastic. Power is provided by means of a battery. It is equipped with three alarm threshold. Detector automatically carries out the surveillance of Bavaria BACM5 CO. Also monitors also himself the CO detector and indicates this via a LED light and a loud alarm sound when an alarm or an error. The shelf life of the CO detector of Bavaria is limited time to five years, this is due to the fixed built-in battery. Detector we have observed in the use of the CO no deficiencies. Rather he has convinced fully us through the very easy to use. We can recommend the CO detector from Bavaria.