This is the NEC GYPSUM Adapter Plate for the NPSTWM Short Throw Projector Wall Mount Arm. It enables the wall mount to be anchored to a "gypsum" or sheet-rock wall.
The wall mount arm is compatible with models NP500WS and NP600S, enabling these projectors to be used in rooms with limited space.
Adapter Plate for Short Throw Projector Wall Mount
90 Day Manufacturer's Warranty