Does the MARS X support HDMI LOOP OUT? Hollyland Tech December 25, 2020 09:47 Updated No, it has only one HDMI IN interface and works with smartphones or tablets. Related articles Where can I find the Wi-Fi password for the device? How many mobile device are supported for the the MARS X at the same time? UPGRADE what is the MARS X wireless transmission range？ Upgrade for Mars M1 Comments 0 comments Article is closed for comments.