It is very simple, a collar made of some plastic fabric on one side, and mesh on the other, that is essentially a linear pouch.

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They seems to have wire mesh on either side and it was probably about two storeys up.

BBC: Smoking

Aesthetically, the single speaker system looks like exactly what you'd expect from Creative, all black, with the vast majority of the rectangle monopolize by mesh and shiny plastic ends on either side.

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