Thermaltake SilverRiver A2173 Portable 5.25" Hard Disk Enclosure Portable 5.25" hard disk enclosure, backup files easily Suited for DVD-RW, DVD-ROM, CD-ROM, CD-RW and 3.5" IDE hard disk drive Stylish aluminum external enclosure Noiseless system fan (4000 RPM) for excellent heat dissipation 480 Mbps throughout for USB 2.0