You want to connect several units of audio- video equipment, but there is a lack of television input signal source terminals. The signal connection wires are often plugged and unplugged, which is very inconvenient. The kids at home wants to connect several units of television game players and use simultaneously, you may switch 4-group AV audio-video signal input and 1- group output to the television. Works with DVD, VCD, TV game, VCR station selector, satellite TV, cameras, XBOX DVD PS2 PS3 Wii Cable Box to TV's yellow-white-red RCA connectors,and so on. Mechanical design, simple push-button switching,No power needed. Metal enclosure, Compact design,excellent stability and longevity. Easy installation and operation, no extra power supply or software drive needed. Switch between AV sources with button on front panel. Support devices with A/V connection, provide clean video and audio,Standard RCA "VIDEO, R-AUDIO-L" (yellow-red-white) connectors.