Package Includes:1 x NAS Dock + Aluminum Shell | The 1-bay NAS Dock is an expansion board which can be used to connect an external hard disk to a FriendlyElec's NanoPi NEO. Together with FriendlyElec's customized aluminum case and NanoPi NEO you can quickly assemble a storage server. | It uses JM20329 USB2SATA IC and communicates with a NanoPi NEO via USB interface. | High-speed USB2SATA IC JM20329 / Supply voltage:12V | WIKI: https://wiki.friendlyelec.com/wiki/index.php/1-bay_NAS_Dock