问题。: Does it support 1080PI 50 輸入?

答: 系嘅, 它支持.

COFDM-904T supports 1080p 50
1080p 50 相機視頻輸入
COFDM-904T 1080P 50 receiver
1080P 50Hz monitor receiving (Please check the below video link or below youtube link)
https://youtu.be/bbX8exaUu0M

问题。: Does COFDM-904T have an audio transmission function?

答: If the audio from HDMI, then it supports, it does not support CVBS audio input, only have CVBS video input (Yellow). Please check the below video.
https://youtu.be/-2ine7z1a70