preowned, working send data quickly, get connected faster, and take incoming phone calls without losing your dial-up connection Internal - PCI; Full and Low profile. ideal for home use Minimum requirements: IBM compatible PC with 233 MHz Pentium with MMX or equivalent, 32 MB RAM, 5 MB hard disk space, PCI 2.2 slot, analog phone line, Call waiting, CD-ROM. compatible with Windows XP, Vista, Windows 7/8/10, Server 12/16/19 all 64-bit versions Unimodem TSP/TAPI compliant Capable of receiving up to 56 Kbps and sending up to 48 Kbps, backward compatible RJ-11 phone cord included