The IP20 rating means this housing is intended for dry, indoor environments — inside an enclosure or junction box, not for washdown or outdoor exposure. The housing is keyed, so the matching plug must carry the complementary keyway to mate; this prevents accidental cross-mating with adjacent connectors of the same series.
The free-hanging mount gives flexibility in harness routing, but the housing has no panel-mount flange or latch, so strain relief must come from the cable bundle itself or a separate tie-down.