I have heard of these devices so far 6 pcs. mounted. The devices are ok the radio coupling to 2 coding levels also works. The pressure of the rotary switch for coding but it should be easier to read. As these numbers are printed one might have these omit entirely. Instead, I've added a ruler over 2 corners for encoding and targeted the position of switches afterwards. Logically Weis should make this a group before mounting on the ceiling with all detectors and test whether the radio coupling fuktioniert. The mounting hardware is thrown (at least at the screw) most equal in the trash. Even the cheapest Baumarkt-screws are so much better than the screws provided. These often break off and then you have double the work because you have to drill the holes again. This happened to me in the first 4 detectors 3 times. Here ABUS angry customers sustained by poor quality. Unfortunately, no longer rely on "Made in Germany" is located. Conclusion: The instrument itself is ok it has VdS approval and functioning properly. The above-mentioned shortcomings, however, upset me so much that I deserved that with more attention to detail of the actual 5 points the device, 2 stars depart.
