Key Digital's KD-HDMI2x4P lets you send two high-definition A/V signals to up to four TVs via high-quality HDMI connections. Connect two compatible sources, such as a high-definition disc player and an HD cable box, then enjoy your favorite movie in the living room while a housemate watches a game in the den. This switcher is also a great solution for multi-display or multi-room setups in small businesses. For example, you could install HD monitors throughout your retail space to advertise different services.