Specification: HDD Support: CD-ROM、DVD--ROM Model:5.25 Chipset: USB2.0桮L811-E PL2506 Size: 25.3*16.2*5.18 cm Interface: USB B-type receptacle Traansfer Rate: USB2.0 480Mbps OS Support: Microsoft Windows 98/SE/ME/2000/XP Mac OS8.6 +