“Well, what can you write about a switch? Solidly made, it seems, plugs between my Pi and its power supply. It switches on. It also switches off - but of course you don't ever want to do that.”
“Works great but if you're using Raspberry 400 with Hifiberry-DAC it disables audio output and there's no sound in Linux desktop. I can't find any reason why but I removed switch and I have audio back on”