The units are as described and processed properly. They are slightly larger than some other products, but certainly the operability is owed. In my decision for this product I have also placed great emphasis on that it is not to cheap goods from China. The packaging has made the the detector were manufactured in Ireland. I have the equipment installed by Numbi magnetic attachment to the wooden ceilings. Function test has worked properly. I think the value for money really reasonable. Unrestricted recommendation
