Usage:Because motherboards now have a lot of SATA interfaces, but SATA does not come with power supply. Now you can use this adapter board to turn SATA into ESATA port with power, with a small 4PIN to get the power, and then with Power Over eSATA cable Easily read data from 3.5-inch hard drives or 5.25-inch drives. The SATA interface on the host can be directly converted to a PowerOver eSATA interface. It does not occupy the PCI or PCI-E slots on the motherboard. Simply mount the adapter on the expansion slot of the chassis.Power Esata: Hard Drive without 12V Power Supply, Only 2.5 inch.Power Over Esata Line: With 2.5V/3.5inch/5.25inch HDD and Optical Drive with 5V and 12V Power Supply.Hardware requirements:One motherboard with SATA interface or One Riser Card The functions that can be achieved:1) Two USB ports can be ferred out with the matching USB2.0 cable.2) Plugging in the SATA cable can switch out two Power Over Esata ports and directly fer the SATA port to the outside. There is no need to disassemble the chassis. You can directly connect 2.5-inch hard disks, 3.5-inch hard disks, and 5.25-inch optical drives. Description:Therefore, the availability of the Power eSATA interface is undoubtedly a very good choice. "The ultra-fast fer rate and efficient protocol make ESATA the most powerful mainstream external storage connection.Normal Esata: Only data mission, no power supply.Power Esata: USB2.0 and ESATA connectors only, with only 5V power supply.PowerOver Esata: USB2.0 and ESATA connectors only, with 5V and 12V power supply. Feature:Expand two Power Over eSATA port from your SATA host.Provide 12V/5V power over the external port(4pin power MUST be connected).The 9pin header on this board must be connected with a 9pin header on your mainboard.The package content of this card including a USB 9pin to 9pin cable.Power eSATA is eSATA + USB combo, NOT eSATA or USB port.No driver needed <br