Do you have a question about the Axxera DMH25 and is the answer not in the manual?
Keeps the adapter connector protected when not in use.
Connects to HDMI input on multimedia receiver or HDTV.
Port to insert microUSB cable for power; most receivers don't need external power.
Press and hold for 20 seconds to reset the unit; external USB power is required.
Connect the DMH25 to the receiver's HDMI and USB port as illustrated.
Optional 1M HDMI extension cable available for external mounting.
Connect DMH25, select DualMirror from menu, image appears on receiver/HDTV screen.
Press reset button for 20 seconds to erase settings and reset the device if connection fails.
Basic instructions for Android: open Quick Settings, tap Screen Mirroring, select device.
Connect iPhone via Wi-Fi, use AirPlay Mirroring to mirror iPhone screen to receiver/HDTV.