① - 3 in 2 out HDMI+VGA switch splitter for multimedia classroom
2 HDMI inputs support max. resolution up to 3840*2160
1 VGA input support 1920*1080
1 aux for line in audio
1 aux audio output mixed with HDMI audio
1 HDMI output for a 4K touch screen
1 VGA output for an Epson projector
RS232 or DIP switch for the inputs selection