Durable wall box mounts horizontally or vertically for flat screen television and home theater applications. Features removable nail tabs used for metal stud mounting, removable interior mounting blocks to allow for more cubic inches in the box, built-in mounting blocks on the top end of the box for vertical mounting, 1/2-inch knock outs for ENT (electrical non-metallic tubing) or PVC (polyvinyl chloride) conduit connections, and low voltage wall dividers to allow for mixed voltages in the same box. Includes heavy-duty mounting screws. UL (Underwriter's Laboratories) approved for single side mounting, extra support bar not required.