It is a wall mounting type. Its dimensions are 1x1x1 inches (length, width, height). This product is an adaptor used to install Vandal Dome camera which is one of Samsung's WN3 series (the same model as SNV-5084 / 6084 / 7084 / 6084R / 7084R) in the electric gang box or on the wall.

Samsung Vandal Dome Camera Back Box, White – PN: SBV-158G