New in box. USRobotics USR5686G 56K External Fax Modem is a brand new, unused product designed for PC connectivity. With a data transfer rate of 56Kbps and a fax transfer rate of 14.4Kbps, this modem offers reliable communication for home or office use. It features error correction capabilities with ITU V.42 and MNP2-4, along with data compression using ITU V.44, V.42bis, and MNP-5. The external enclosure and cable transmission line make it easy to set up and use, while the RJ-11 and Serial RS-232 interfaces ensure compatibility with various systems. Ideal for those looking for a dependable fax modem with modern technology standards.ew