The HDMI® matrix 412HN features a 4-input to 2-output design and supports one SPDIF optical digital audio output as well as two 3.5mm stereo analog audio outputs. It is capable of supporting resolutions up to 3840x2160 at 60Hz. Switching between inputs can be accomplished via both remote control and button controls.
The attachment is Xudongtai HDMI® KVM seamless switch four-in-three-out 413HW PDF instruction manual compressed package, which can be viewed online or downloaded; the content details include the physical size diagram of the switch, the interface description diagram, as well as the connection usage diagram and specification parameter diagram.
2023 2-port HDMI® KVM switch 21HK manual, including interface button instructions, connection usage diagram, keyboard hot key switching instructions, RS-232 control code
Attached is the eKL 4-in and 2-out HDMI® KVM Seamless Dual Screen Switch 412HW PDF format instruction manual in Chinese and English, which you can download and view.