The Guntermann & Drunck DVIVision-MC4-U2-CPU KVM Quad head transmitter, A1410033 has now been superseded to the DVI-Vision-CAT-MC4-ARU2-CPU A1410174, please Click on the link below to take you to the new specifications and data sheet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-a1410174-pr-2242.php
The added advantages are as follows:
Audio and Serial as standard
Operational On-Screen Display
Pro-active system Monitoring & Web Interface as standard
Optional Rack Mount kit