This is a weatherproof outdoor 13 Amp fused 2 gang electrical switch manufactured by British General. The switch is weatherproof to IP55 giving protection from water and dust when the cover is closed.
For connections there are 4 x M20 cut-outs (one on each side) and 1 x M25 cut-out, with a sealant ring, on the rear. 44mm fixing centres with horizontal and vertical adjustment.
The switch is easy to install and comes with installation instructions.