Xiaomi Mi 4K Laser Projector 150” User Manual page 8

Connection Ports
Power Port
1
HDMI input port 1
2
HDMI input port 2
3
HDMI input port 3
4
Audio return channel port
Supports USB 2.0 communication protocol
5
Audio output port (supports subwoofers)
6
AV input port (3.5 mm composite AV port)
7
Optical digital audio signal output port
8
Ethernet port
9