Avatex 1200HC External Modem. This modem appears to be in great condition. It comes with a built-in RJ-11 phone cable and a modem cable for the Macintosh or IIc Plus or IIGS modem port. I do not have a power supply/adapter for this modem so am unable to power on. It should work with just about any computer with a modem or serial port with the proper modem cable and communication software.