A modular assembly for electrically coupling to a duplex wall socket having a pair of outlets. A first modular unit has a first set of electrical prongs for inserting into one of the outlets. The first set of electrical prongs power a large number of receptacles provided on the first modular unit. An aperture is formed within the first modular unit to expose the other outlet. A second modular unit having a second set of electrical prongs is plugged through the aperture into the second outlet. The second modular unit includes a reel mounted extension cord with additional receptacles on the end of the extension cord. When used together, the modular units matingly engage to provide a stabilized assembly with a large number of local and remote receptacles.