This is an *older* Apple Airport Extreme WLAN box. It connects to wired Ethernet cables (such as from a cablemodem or DSL modem) with a standard Ethernet port and can be used as an Airport hub or Airport network extension. Additionally, the item can be used for wireless sound transmission (via the headphone jack which is both a standard headphone jack and a optical mini Toslink port; and the item can be used to make a USB printer or hard drive wireless. Note this is an older model which transmits at somewhat slower data rates than Apple's newest models. Please look up the specs as needed and make sure it is compatible with your system; the Apple model number is A1088, see image of the label, the serial number on the image is the actual serial number of the device for sale. All images are from the original items for sale. Note that this is a private auction from a private seller, so standard exchange or return policies do not apply here. However, if you discover a problem with the site within one week of receiving it, let me know and I will take it back for a full refund. Thanks for looking!