ITEM NAME:SATA/PATA/IDE Drive to USB 2.0 Adapter Converter Cable for 2.5/3.5 Hard Drive Hn.This Unit does not require External Power Adapter if you are going to connect 2.5" IDE Hard Disk drive, but for any other devices such as 3.5" IDE, SATA Hard Disk Drive or CD-RW, DVD-RW, CD Rom, DVD Rom it will require external Power Adapter if it is not connected to one already.
