Review on High-Performance 4-Port USB3.0 HDMI KVM Switch with CEC, SPDIF 5.1 Extractor, and USB Peripheral Hub - Ideal for Keyboard, Wireless Mouse, Printer, Scanner, Windows, 4K 60Hz HDR HDMI Auto Switch 4x1 with IR Remote, IR Extender, and Mic Input by Michael Swanson

I am only using 2 of the 4 ports on this KVM with a wireless mouse and keyboard. I had no issues with the HDMI ports, but the 2 USB ports on the back were very unreliable for both wired and wireless keyboard and mouse. My wireless mouse and keyboard didn't work reliably with any of the four USB ports. I had to constantly plug and unplug to get it working but then stop again during use. The only setup that seems to work for me is a wired keyboard on the back (USB2) and a wired mouse on the front (USB4). I tried plugging a wired mouse into the rear USB port (USB1), but switching inputs didn't work reliably either. I need a product that will reliably support my wireless mouse and keyboard, so I have to return this product.