This E.F.G. model's size is adjustable, so it can be sized to cover your whole nation. If your nation is big enough, you may need 2 or 3, up to 5. The E.F.G. disables all electronics that passes through the field. Nothing inside our outside is effected, just what passes through it. The fields can be turned on and off, by flipping a master switch, to allow allies and your nation's things in. 1 E.F.G. costs $^200,000,000 ( $500,000,000 USD ).