I have replaced a (expensive) MERTEN detector, since a minimum load for that of
Was> 25 watts required and it was therefore not suitable for saving lamps and LED lamps.
The neutral conductor is required!
The installation dimensions are indicated in the product description,
not suitable for normal 60 flush-mounted boxes - but rather for installation
in Paneel- or plasterboard walls ... otherwise there is extensive caulking work!
For this, he has a low installation depth, unlike other devices.
The processing makes a solid impression