Digi Neo Universal PCI (3.3V & 5V) 8-port. Host interface: PCI . Width: 18.4 mm, Depth: 119.9 mm, Height: 62.2 mm. Operating temperature range (T-T): 0 - 55 °C, Storage temperature range (T-T): -25 - 85 °C, Operating relative humidity range: 5 - 90 %. Minimum system requirements: PCI-X/PCI (3.3V & 5V), Compatible operating systems: Microsoft Windows Server 2003 Microsoft Windows XP Microsoft Windows 2000 Microsoft Windows NT , Power requirements: +5V +/- 5%, 20 mA, 100 mA; +12V +/-5%, 100 mA, 150 mA