Xantech, Matrix Switcher, models:

HD44C	Installation Instructions Manual
HD44CC5	Installation Instructions Manual
HD88C	Installation Instructions Manual
HDMI4X4	User Manual
XT-HDBT-EX70-4K-RX	User Manual
XT-HDBT-MX44-4K-KIT	User Manual
XT-HDMI-MX44-4K18G	User Manual