The RC-63DLN is a 6-button room controller with a digital volume knob for multimedia rooms. The unit can function either as a standalone controller or as part of a more complex K-NET room control system to control audio components, video components and other room facilities such as lights and screens. 6 Programmable Buttons - Color, back-lit & label capable. Programmable Back-Lit LCD Group Labels - Displayed text can be configured. Digital Volume Control Knob. Macro Capability - Carries out multiple commands with a single press of a button. Command Banks - Each button offers multiple layers of functions for alternate behavior, toggle functionality, and more. Internal Clock - Schedules recurring tasks, defines system shutdown timer for economic operation, and more. USB Port - For upgrading firmware. Bidirectional RS-232 Port - Controls AV equipment such as projectors, LCD and PDP displays, power amplifiers, switchers and scalers. IR Output - Additional control port for AV equipment. IR Learning Function - Learns commands from IR remotes. 2 Relay Contact Closure Ports - Conveniently controls other room items related to the AV system such as raising and lowering drapes, the screen or the projector. 2 K-Net™ Connectors - Connects to other control panels or a central control processor. K-Net Control Channel - Provides power and control data to the wall plate controllers over a single cable. Note - Available in white or black. Size - Wall Plate - 2 gang European or US.