That is short for Universal Plug and Play.

That is short for Universal Plug and Play.

That is short for Universal Plug and Play.

That is short for Universal Plug and Play.

The Sirius Plug and Play Universal Boombox does not play CD's or MP3's directly,but it does have an auxillary plug you can use to attach a cd player or mp3 player.

A universal plug.

One can purchase universal plug adapters online at Best Buy, Future Shop, Lowe's, and Home Depot. Universal plug adapters can also be purchased online on Amazon and Ebay.

UPnP stands for universal plug and play. If you have a network (more than one computer in your home that are networked to share a connection) and you want to share plug and play devices (like a printer, perhaps) then this exception will keep your firewall from blocking plug and play devices. If you do not want to share plug and play devices, you should disable the exception. If you do have a network, make sure it is secure.