Unlicensed broadcasting
（重定向自Pirate broadcasting）
Unlicensed broadcasting, also called pirate broadcasting is a term used for any type of broadcasting without a broadcast license.
Some unlicensed broadcasting, such as certain low-power broadcasting, may be legal. For example, in the United States, Title 47 CFR Part 15 (or "part 15"), is a regulation that allows unlicensed broadcasting within a range of just a few meters. Legal broadcast methods may include ISM bands, used legally at low power to broadcast for personal use, a video sender, used to distribute video (sometimes wireless security cameras) within a home or small business, or FM transmitters, used to transmit satellite radio or digital media players to stereo systems which have no wired input (i.e. car radios).