Suitable for 1 module, outdoors • The blue housing is firmly connected to the subsurface or brick work. It can also be used to ensure easy installation in cavities Drill opening, position housing and screw tightly in place; the retaining wings, which automatically swing out, secure the housing, while the plastic bars at the edge of the housing prevent it from sliding into the cavity. • Required flushmounting opening 117 x 129 mm (width x height) • Permissible wall thickness for cavity installation 7 to 27 mm