... plastic Product Specification: 1.Support 2.5/3.5 inch SATA HDD;2.Support hot swap,Plug&Play;3. With 2 ports USB2.0 HUB, 4 ports card ... /SEMac OS 8.X-10.X Linux kernel 2.4 or above8.Accessory:USB2.0 cable,eSATA cable,Poweradaptor,User manual,Warranty card ... will be happy to answer your questions and inquiries. 4bay usb2.0 hdd enclosure support 2.5'' or 3.5'' hard disk drive