Full Details from Amazon.com : http://www.amazon.com/gp/product/B00550FWYO?tag=onigi-20
D-Link Systems Inc. KVM-440 8-Port PS2/USB Combo KVM Switch
On-screen Display OSD
Supports daisy chaining with up to 3 cascade levels- control up to 512 PCs from a single console
Features keyboard emulation to prevent boot errors
Supports hot-plugging
Computer selection via Front Panel Button Hot-Keys via a PS2 keyboard and OSD Menu On-screen Display
Supports Auto-Scan function