Komingo Av Signal Switcher Multi Box 3 Input 1 Output System Audio-video Input Selector 1.You want to connect several units of audio video equipment, but there is a lack of television input signal source terminals. 2.The signal connection wires are often plugged and unplugged, which is very inconvenient. 3.The kids at home wants to connectseral units of television game players and use simultaneously,you may switch 3-group AV audio-video signal input and 1 group output to the television. 4.DVD,VCD,TV Game,VCR station selector,satellite TV,cameras,etc. 5.Directly exposed manual switchover,design of no connection to power,quick installation and convernient application.