Digitus DS-55306 Mode D'emploi page 6

NOTE:
This device can be powered from the HDMI source device (which with
HDMI input port) directly. However, when the transmission/connection is
not stable, or the output is not fluent, please connect Micro USB cable to
the DC5V port for power supply.
HDMI Extender RX receiver
① Power input
Wireless connections
②
indicator
③ Data transmission
④ HDMI input
⑤ Antenna
Connect with DC5V/2A power adapter
Led keeps on when power on, blinks when
it is successfully connected
It keeps on when it is transmitting data,
otherwise, it's off.
Connect with HDMI display device
Connect the antenna