Once your WAVE is mounted on your TV as per the instructions here, you are ready to link your device to HDMI and power.
Insert one end of your HDMI cable into the HDMI port on the back of the Android Box, and the other into an HDMI port on your TV.
WAVE AC Adapter
Insert the DC plug on the WAVE AC Adapter cord into the DC input connector on the back of the Android Box. Insert the AC plug into a 120V AC wall outlet.