This manual is only applicable to the 2021 new HDMI® KVM switch 8 in 1 out 81HK. The old 81HK manual is the same as the old 41HK manual. The details are attached with the RS232 control code of the latest 81HK. The switching modes are diverse and can be flexibly installed
2-port/4-port VGA KVM switch 21U/41U Chinese and English PDF manual download, attached diagram
2 in 1 out/4 in 1 out VGA KVM switch, USB printer sharer 21UA/41UA instruction manual download
VGA KVM switch 8 inputs and 2 outputs 81UA is both a VGA KVM switch and a USB printer sharing device; 8 hosts can be manually controlled to share 1~2 printers through a set of keyboard, mouse, and monitor