USB 2.0 to SATA/IDE Converter HDD Cable for 2.5''/3.5'' Hard Drive CD DVD RW Rom
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.