Summary: I use this product with a KVM switch that only has PS2 connectors and it works prefectly. I did not want to have to buy a new KVM and cables so I thought I would give this a try. There are other adapters out there for less, but I would not trust them. I have tried to use the single USB to PS2 adapters for a mouse before and I never could get that to work. With this adapter it really is plug and play. I just connected this to my KVM, turned on the computer and it has worked perfectly with no problems for over a week now.