Koutech 5V/12V Power Over eSATA cable with SATA HDD Adapter Power Over eSATA connectors will provide 5V & 12V bus-powered via its connectors (*Will provide 5V & 12V power to Power Over eSATA supported devices only ) With Power Over eSATA connectors; it eliminates the requirement for a separate power source, while maintaining compatibility with the existing eSATA connector form factor Supports both 2.5" and 3.5" SATA drives Supports SATA & SATA II drives **Power supply may still be required if the eSATAp card does not support 12v.