To the thing itself:
- Solid quality, made of sheet steel - looks like the real thing
- It is appropriate at lightning speed
- Tip 1: The supplied dowels and screws are oversized - namely so big that you could use for a real-filled version. In order to keep only the box (weighs 1 kg) range significantly smaller anchors, and it satisfy two pieces.
- Tip 2: The box has "vents" penetrates through in the real version of the alarm sound. If you stand directly below you will see that the box is empty at the dummy. Therefore either attach so that other people are so easily can not see from the bottom - or anything indefinable reintun, eg the inner workings of an old alarm clock, a computer speaker or the like.
Otherwise, I would highly recommend this thing around. Our door sticker "This house is electronically" (also available for purchase at Amazon) seems so much more believable.