PL71 Back box for flush-mounting the PL11P (no camera) or PL41P (mono camera) or PL41PC (Colour camera)
There is also a hood cover PL81 for the combination which is not shown
PL91 Rain shelter for surface mounting any of the modules; PL11P audio only, PL41P with mono camera, or PL41PC with colour camera.
This replaces the PL71 and PL81