press kit

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A packaged set of promotional materials, such as photographs and background information, for distribution to the press, as at a news conference or before the release of a new product.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A packaged set of promotional and news materials about a person, band or product for media to use. The kit will often include a cd or demo along with reviews, photos, and background information. The kit is distributed to media sources, such as radio stations and newspapers.