The Dell Conexant RD02-D490 External 56k Cat Modem Fax Narrowband, NW147 is a modem card designed by Dell specifically for use with computers. It provides a narrowband modem connection for faxing and other communication needs. This external modem is compatible with CAT (controller area network) systems and offers reliable performance for various computing tasks that require a modem connection. With the brand's reputation for quality and performance, this modem card is a dependable choice for users looking to enhance their computer's connectivity options.