The AirPort Extreme was updated on January 9, 2007, to support the 802.11a/b/g and Draft-N protocols. This revision also adds two LAN ports for a total of three. It now more closely resembles the square-shaped 1st generation Apple TV and Mac mini, and is about the same size as the Mac mini. The new AirPort Disk feature allows users to plug a USB hard drive into the AirPort Extreme for use as a network-attached storage (NAS) device for Mac OS X and Microsoft Windows clients. Users may also connect a USB hub and printer. On August 7, 2007, the AirPort Extreme began shipping with Gigabit Ethernet, matching most other Apple products.