The UDC software can be used by itself or with the optional USB connected UDC 400. The UDC 400 is a 40 button panel with multicolor LED indicator lights. The UDC 400 controller can quickly and easily be set up to control multiple devices through the Universal Device Controller Software. You can define what colors you want the LEDs for the buttons to display for quick and easy controller management and indicators. Use the Universal Device Controller software alone or with the UDC-400 Button Panel to control a variety of devices from a centralized and managed system. UDC comes with protocols for many popular devices and adding protocols is easy using the intuitive interface.