The PoE technology allows single Ethernet cable to transmit both power and data to the IP bird box camera. There is no need for extra power cord wiring to your nest box. The DC12V power connector is optional. While PoE is being used, the DC12V power connector can output DC12V which is passing through from PoE.
The HDMI decoder can take the full HD video source from IP camera, and output the video to HDMI TV. Attach the USB mouse to USB port to manipulate the GUI menu on screen. The audio will be output through HDMI cable. You also can connect the RCA audio to external speaker. The HDMI decoder provides VGA port as well.