The Western Digital My Book Live Duo is a wireless network storage device that allows you to share files with other computers, stream media to your TV and even open files remotely. Plus, RAID 1 technology provides dual security to keep your data safe.General Information:Capacity : 2 x 2 TBInterface : 1 x Ethernet 10Base-T/100Base-TX/1000Base-T - RJ-45Performances : Ethernet, Fast Ethernet, Gigabit Ethernet iTunes server, UpnP Media ServerSize : Height: 16.7 cm Width: 5 cm Depth: 13.9 cmWeight : 1.09 kgRequired Configuration : Apple MacOS X 10.6, Microsoft Windows Vista / XP / 7, Apple MacOS X 10.5 Content : My Book Live Do 4 TB, network cable, mains adapter, Smartware software