The WP21S provides ideal placement and alignment for mounting to wood studs, steel studs, and concrete. Compatible with the RPA, Elite, RPA Mini and Elite Mini Series projector mounts (must order mount separately). Also supports wall-mounted long-throw projectors. Features: Precision adjustment Projector mount slides along arm for infinite projector placement Integrated micro leveling Lateral shift of 1.75 Integrated cable management Aesthetic covers and inlay style cable management system conceal...