Compound AV switch 4 in 3 out-This 4 in 3 out composite 3 selector patterns "video, l-audio-r", 4 in 3 out, if you own 3 tv set but more than 1 audio and video device, this av switch composed of 4 ways (4 in 3 out) is suitable for you, does not support matrix mode. Easy to use/true plug & play-pure hardware design, be connected and disconnected easily. No software drivers are needed, just press the selection button on the av switcher box component to choose av fonts. Remote control go, you can switch any input (N64, TV box, PS2 etc) to three AV output.