US Robotics 56K OEM PCI Voice Faxmodem. Modem speed: 56 Kbit/s, Interface: PCI. Minimum system requirements: 2 MB HDD, Minimum processor: IBM PC, 233 MHz Pentium, Minimum RAM: 32 MB. Operating temperature range (T-T): 0 - 50 °C, Operating relative humidity range: 20 - 80 %, Storage temperature range (T-T): -20 - 70 °C. Certification: FCC (15), FCC (68), UL60950, CUL, ICES-003, CS-03, CE