The Trendnet TFM-560X is an external 56K modem that allows you to connect your computer to the internet using a standard analog phone line. It features an On/Off switch, an AC power adapter port, a COM RS-232 port for connecting to your PC, a LINE port for connecting to the internet, and a PHONE port for connecting to an analog telephone. The modem is compatible with Windows XP, 2000, ME, and 98SE operating systems. It also supports caller ID and distinctive ring detection. The TFM-560X is a reliable and affordable solution for connecting to the internet at speeds up to 56Kbps.