Please pair the new HDMI transmitter with receiver at the first using time:
First, long press the receiver's middle button, until it shows "release the button"
Second, long press the transmitter's middle button, until itshows "Pairing"
Third, wait 5s, it will show "Paired is OK", then it will auto stream video.
One receiver can be paired with up to 8 transmitters. The connection way is the same.
One click the first TX's middle button, then it will be back to the blue interface. Then one click the second TX's middle button. It will display the second TX's content.