The SupraFAXModem 288 External Modems is a silver dial-up modem with a maximum downstream data rate of 28.8 Kbps. It features a serial port (RS-232) and has dimensions of 6 inches in length, 1 inch in height, and 4 inches in width. This modem is designed for faxing and connectivity with POTS RJ-11 ports. Made by SUPRA, it is a single unit originating from the United States. Ideal for home networking and communication needs.