Up for sale is a brand new Federal Signal Serial Interface Module (8583469E). It is brand new and unused, and comes with the black module box and cable. From the Federal Signal website: Enables a Federal Signal Convergence Network (serial) product to connect to a traditionally wired siren, switch, relay, or controller Black, plastic housing All programming features are externally accessible FEATURES The Serial Interface Module is a device to communicate with Convergence Network (serial) controlled light bars, ILS systems, and CN SignalMasters. To minimize the number of discrete wires (traditional individual wires) to the light bar, control lead functions are wired to the Serial Interface Module. The information is converted to a digital format and communicated to the light bar via the serial communication cable. Easy Programmability All programming features, such as light bar pattern selection, front/rear cutoff, intersection mode, and SignalMaster control, are externally accessible. There is no need to open the module or access it internally. INSTALL INSTRUCTIONS https://www.fedsig.com/resource-document/file/8148