Features 1) 3.5" / 5.25" USB 2.0 aluminum hard drive enclosure 2) USB 2.0 high speed data transfer 3) External enclosure for 5.25" IDE CD-ROM / CD-R / CD-RW / DVD-ROM / DVD+RW / DVD-RE and 3.5-inch IDE hard drives 4) Advance noise control design 5) Built-in cooling fan 6) Truly Plug and Play 7) Hot swapping 8) Universal auto-switching power 9) Built-in on / off power switch for easy usage 10) Supports Windows 98 / SE / ME / 2000 / XP, Mac OS 8.6 or later versions 11) Chipset GL811E / CY68300 (AT2) 12) Main accessories a) USB2.0 cable and power cord b) Driver CD c) Screw bag d) Users' manual