product description:

1.4 Into 1 out / AV converter / audio and video converter / audio and video switcher / video and audio converter
2. Four input, all the way to output, through the above switch to switch, so that all the way to the three input and output are connected
3.S terminal, 2 into 1 out

Interface: audio and video RCA jack / S terminal

There are four switches on the upper panel, and the corresponding indicator.
 
4 AV audio and video input, including two with S-Video output, 1 audio and video output, you can freely switch one of the signal output.
No power required.