DVI yes. Cordless keyboard and mouse, don't know. (Haven't tried it).

Potentially a problem with multiple cordless devices in close proximity? Say 4 PCs, each with a USB mouse and/or USB keyboard receiver and they're all within say 10-15 feet of each other. Is that going to work even without the KVM? (If you wiggle one mouse is it going to move the cursor on all four PCs? What about typing?)