Bytecc ME-850. Size: 88.9 mm (3.5 "), Hard drive interface: Ultra-ATA/133. Compliance industry standards: 100BASE-TX/10BASE-T, Data link protocols: TCP/IP, NBNS, CIFS/SMB, HTTP 1.0/2.0, DHCP, SNTP. Compatible operating systems: Microsoft Windows 98SE/ME/2000/NT4.0/XP/Vista/7, Mac OS 10.3+. Colour of product: Black. Dimensions (WxDxH): 60 x 175 x 195 mm, Weight: 0.95 kg