Does Mars M1 support 4K input and output? Hollyland Tech September 15, 2022 02:52 Updated OVERVIEWS: Mars M1 supports 4K input, when HDMI input 4K from camera to Mars M1, but the monitor only show 1080p and transmit 1080p. Mars M1 supports up to 4K30 input but it only shows 1080p on the screen, and it just transmit 1080p when as transmitter. When input 4K30 through HDMI IN, the HDMI OUT can loopout 4K30. Article Number: 【AS-220827003_4】 Comments 0 comments Article is closed for comments.