0.5m 12V 5V Power eSATA USB 2.0 Combo To 22 Pin SATA Cable For 2.5" 3.5" HDD Brand New and Never Used Supports 5V/12V Power Over eSATA to SATA 22 Pin HDD Adapter Cable Supports with 2.5",3.5" SATA HDD and 5.25" Blueray Play, DVD Play ect. Power Over eSATA connector. Your desktop will have to support ther Power eSATA 5V and 12V.