The 4x Stereo Switch works Kinderleicht. Simply using a rotary switch to select one of the 4 channels and enjoy the music. The housing, made of metal, meticulous workmanship and stands on 4 rubber feet. The rear connected cables do not topple. The switch engages a well and the nut as shown in the picture is not visible, it is covered by a cover at the rotary switch. All channels switching through clean and you can hear any crackling or otherwise. I run it at 2 PC's and a 2.1 sound system Logitech x230. I have for the operation of 3 cable ordered 2 times Hama connection cable 3.5 mm jack plug - 2 RCA plugs, 2 m and 1 times Hama Audio Adapter 2 RCA plugs - 3.5mm Stereo Jack Socket , Just plug it in red on red and black on white. The einziege which would be easy to complain about is that the marks on the rotary switch and the housing a bit offset.