The RPAU has all of the great features of the RPAO and even more! This Universal Projector Mount is coupled with the newly designed SLBU Universal Interface Bracket. This 2nd Generation Interface Technology has enhanced security and unlimited projector access. Features Ships newly designed SLB universal bracket to fit most inverted projectors on the market Independent roll, pitch and yaw for quick and precise projector image registration Quick projector connect and disconnect with convenient lamp and filter access on most projectors Maintains registration when disconnected and doesn't affect preset adjustments All-Points™ Security Systems provides exclusive steel into steel locking hardware at all connection points to protect against theft Multiple installation options: flush mount to ceiling, 0.25" threaded rod, or 1.5" NPT threaded extension column Integrated cable management through top of mount without additional accessories