
I needed a 4-port KVM to replace a 2-port KVM when adding a third computer. I tried 4 others (2 IOGear, 1 Trendnet, 1 StarTech) and they all had problems, either the mouse or keyboard didn't work or the video only worked on some PCs. This one from CKLau is the first that worked for everything. I use it with a gaming keyboard and mouse with Hot Switch Off front button and they work fine. The video goes 1-2 seconds when switching, the rest is normal. Also use the speaker connector to power external amplifiers/speakers. In the future I will try to connect a small USB hub with a video camera and microphone to the front connector. I liked that the kit included cables and a power adapter. Only a week or so but so far it's doing everything I need it to.

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