The Guntermann & Drunck DVIVision-MC3-CON KVM Triple head Receiver, A1320015 has now been superseded to the DVI-Vision-CAT-MC4-AR-CON A1420204, please Click on the link below to take you to the new specifications and data sheet
http://www.omniotech.com/gd-dvi-vision-cat-quad--head-screen-a1420204-pr-2238.php
The added advantages are as follows:
Audio and Serial as standard
Four Screen Extension with one Keyboard and Mouse
Operational On-Screen Display
Pro-active system Monitoring & Web Interface as standard
Optional Rack Mount kit