Simply connect 3 audio and video devices (such as Xbox, Xbox 360, Wii, PS3, PS2, PS1, SNES, DVD, VCD, STB) to the "INPUT 1, 2, 3" connectors and your TV to the "OUTPUT" connector. To select one of the 3 connected devices, just press the corresponding button "1, 2, 3" instead of inconveniently reconnecting the audio and video devices repeatedly