The RC-74DL is a 12-button master 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 room control system to control audio components, video components and other room facilities such as lights and screens.- 12 Programmable Buttons - 3 groups; color, back−lit & label capable.- Configurable Digital Volume Control Knob.- Programmable Back-Lit LCD Group Labels.- 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.- 1 USB Port - For programming.- 3 Bidirectional RS-232 Ports - Control AV equipment such as projectors, LCD and PDP displays, power amplifiers, switchers and scalers.- 2 IR Outputs - Additional control port for AV equipment.- IR Learning Function - Learns commands from IR remotes.- 4 Contact Closure Ports - Conveniently control other room items related to the AV system such as raising and lowering drapes, the screen or the projector.- 2 GPI/O Ports - General purpose I/O ports that can be configured by K−Config as digital inputs, digital outputs or analog inputs for interfacing with a variety of devices such as sensors, switches, LEDs, or relays.- 2 K-NET™ Connectors - Connect 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.- Kramer Site-CTRL Compatible - For network remote control and management using Kramer Site−CTRL software over the Ethernet port.- Configured with Kramer K-Config Software.- Mud Ring Supplied for Easy Installation.- Dimensions - 16.2cm x 2.6cm x 11.4 (6.4" x 1.0” x 4.5") W, D, H.- Note - Available in white, black, gray and brushed aluminum.