Cable TV delivers signals from a head end station to subscribers' homes through a distribution system of cables. It offers locally originated programming as well as content from broadcast stations, networks, and pay services. Revenue comes from subscription fees, local advertising, and carriage/access fees. Satellite TV transmits content via satellites and receivers. Subscribers pay monthly fees to access encrypted national programming. Internet video includes both professionally produced content from media companies and user-generated amateur videos. It generates revenue through subscription fees, merchandise, advertising, and various combinations of monetization strategies.