Review on Aluminum Red AVMTON HDMI KVM Switch - 2 Port, 2 in 1 Out for Sharing 2 Computers and 1 Monitor. Includes USB and HDMI Cables, Support for Hotkey Switching, Wired Keyboard and Mouse. UHD 4K@30Hz, 3D 1080P Compatible. by David Stover

This device for some reason brings a high pitch in the audio of my Asus UX305 laptop with Windows 10. This kind of Audio interference is not uncommon for laptops with certain peripherals, as an internet search will confirm. There is some interference from the USB ports of the KVM switch. If you connect the USB ports of the keyboard and mouse directly to the laptop, the sound is normal. A continuous high pitched whistle is produced when using the AVMTON switch. I've tried various solutions found on the internet and none of them have worked so far. This may not be a problem for most users, but if that's the way your hardware communicates with the Switch, you basically can't use external speakers with the Switch for any PC that has the problem unless you can live with that. deteriorated sound.