ICY DOCK 4 Bay 3.5" Sata To Esata Port 4 Bay 3.5" SATA to eSATA Port Multiplier & USB 2.0 Hard-drive-enclosures USB 2.0 to IDE Adapter w&#47;Power The enclosure has a detachable 80mm ball bearing rear fan and uses a built-in fan-less power supply making it a quiet device.