I've had this KVM a little over a week now and am very happy with it. a bit better, but they really aren't needed, and the details you need to use KVM are clear enough. The cables are about five meters long. I really like how the USB cable is integrated into the HDMI cable for PC connection. I've had no problem with the length of the USB cable in my mid-tower cases, which runs between the top USB port and the HDMI connector on the PCI-e card about halfway up the tower. I have three machines with Ubuntu 20.04. plugged in and they all work fine with my wired USB keyboard and mouse. Switching between PCs is fast enough, as fast as any other KVM I've used. I don't game, but the video quality on my monitor is as good if not better than my previous major brand 2-port HDMI KVM which cost twice as much. I did not see anything in the product. Description of "Beep". The beep is the sound the KVM makes when switching between sources. At first I wanted to turn it off, but after getting used to it, I kinda like it. This can be an issue if you're in a room with a group of people using these KVMs, but it's not an issue in my home office. I haven't checked, but maybe there's a way in the manual to disable the beep. Overall I'm very happy with this KVM and wouldn't hesitate to buy it if you're looking for a good 4 port HDMI USB KVM.
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