Review on 🔀 CKL KVM Switch Dual Monitor DisplayPort 2 Port 4K 60Hz 4:4:4: Ultimate connectivity and seamless control with CKL-622DP by Wayne Laguna

If you're looking for a KVM that can output 4k @ 60Hz at 3840 x 2160 resolution to dual monitors, this might be it not the right product for you. I have two 4k monitors that I use in my home office between two computers and an RTX 3080. Without this switch, the computer will output 4k @ 60Hz to both monitors with no problem. As soon as I added this device, the monitors started flickering until I lowered the resolution. It worked fine at 1920x1080, but what good are 4k monitors if you can't use them at 4k? I ended up returning it and buying another KVM that works great.