Device Built-In Box GDM
is available pre-assembled, saving time with screwless assembly by snapping into the cover contour of the unit channel
![](https://products.niedax.de/media/catalog/category/EUCDGN1T2SR7ARI3I3R00V80-Erweiterungsmodul-GDMM.jpg)
Extension module GDMM
allows on-site extension of the single box to a double and triple box by means of an extension module