Non-gangable device box 3 inches height x 2 inches width x 2-1/2 inches depth 12.5 cubic inches volume. Wraparound bracket for 2-1/2 inches and 3-5/8 inches steel studs. With integral support bracket. Brackets positioned for 2 layers of 1/2 inch drywall. Recessed 1 inch. 1 gang.