Poland has a number of major media outlets, chief among which are the national television channels. TVP is Poland's public broadcasting corporation; about a third of its income comes from a broadcast receiver licence, while the rest is made through revenue from commercials and sponsorships. State television operates two mainstream channels, TVP 1 and TVP 2, as well as regional programs for each of the country's 16 voivodeships (as TVP 3). In addition to these general channels, TVP runs a number of genre-specific programmes such as TVP Sport, TVP Historia, TVP Kultura, TVP Rozrywka, TVP Seriale and TVP Polonia, the latter is a state-run channel dedicated to the transmission of Polish language television for the Polish diaspora. Poland has several 24-hour news channels such as Polsat News, TVP Info and TVN 24. Poland also possesses a variety of free-to-air television channels, chiefly TVN, Polsat and TV4.