I have one large 43" Ultra HD 4K monitor with 3840 x 2160 resolution that I share between a desktop and laptop, all using DisplayPort connections. I also use a trackball mouse. I never thought I would find a compatible KVM switch. I tried IO Gear and their KVM did not work. I researched several other KVM switches from other manufacturers, and none were compatible. I was hesitant due to the price, but this switch has been great. One of the features I like is that is has only one USB connection to each PC, whereas most KVMs have two (one for mouse and one for keyboard). I also like the desktop button for switching. The unit has small white lights to indicate which PC is currently active, which really helps during installation and troubleshooting. It is compact, and has nice long cables to connect each PC. I have been very pleased with this KVM switch, and highly recommend it.