Alecto Coa3920: Pros And Cons, Common Issues, And Best Places To Purchase
Alecto COA3920 Information The Alecto COA3920 is a carbon monoxide (CO) detector with a 10-year sensor lifespan. It is a small, white device with a textured surface that makes it blend in with most walls. The COA3920 has a built-in display that shows the current CO concentration in ppm (parts per million). It also has a test button that can be used to verify that the detector is working properly. Image: Full specifications: