Replace your lost or failed power adapter. This replacement power adapter can provide a power source for any electronic device that has a 4-pin DIN barrel and requires 12 volts and up to 6.5 amps of power. The adapter is a perfect replacement for the lost or damaged power adapter you\'ve used to power your existing electronics. When downtime isn\'t an option, keeping spare power adapters on hand ensures that you won\'t be left waiting for a replacement to arrive or have to replace your devices just for the sake of a compatible power source. This power adapter is a direct replacement for the power adapters included with the following StarTech.com products: USB 3.0 / eSATA 4-Bay 3.5in SATA III Hard Drive Enclosure (S3540BU33E); 1U Rackmount 4-Bay 3.5in SATA / SAS External Hard Drive Enclosure (SAT35401U); 4 Bay eSATA USB 3.0 to SATA Hard Drive Docking Station (SATDOCK4U3E); 4 Bay USB 3.0 eSATA to SATA Standalone 1:3 HDD Hard Drive Duplicator Dock (SATDOCK4U3RE); USB 3.0 to 4-Bay SATA 6Gbps Hard Drive Docking Station (SDOCK4U33).