RPA Elite with Lock C (1st Generation Interface Technology)Focusing on speed of installation, these elite mounts are packed with easy-to-use features that save time and maximize projector security. - Microzone Adjustments make projector registration fast and precise (including flush mount installations)- Centris Technology enables effortless fingertip positioning and self-adjusts to support different projector weights- Quick connect/disconnect for convenient lamp and filter access on most projectors- Maintains registration when disconnected and doesn't affect preset adjustments- Cable management without additional accessories- Q-Lock Quick Release Lever provides quick connect/disconnect of the projector for service and enhanced security with an integrated key and lock system- Same great features as the RPA Series, including independent roll, pitch and yaw, integrated cable management, and All-Points Security- Speed-Connect line of accessories further reduce installation time.- Adjustable mounting legs and feet