IXON Ultra is a new USB version of the camera. DU-897U IXON is the older PCI version of the camera. DU-897 20161028_100235.jpg - IXON Ultra picture Side view 20161028_100244.jpg - IXON Ultra picture Front 20161028_100252.jpg - IXON Ultra picture Bottom Andor_iXon_Ultra_897_Specifications.pdf - IXON Ultra drawing on page 5. DU-897_BI.pdf - IXON (pci) drawing on page 5.