2.6 Additional power cord
The camera kit come with 10 meters DC12V extension cable. If the cable is too not enough to reach the bird box, you can order additional cable. The DC12V extension cable is burial grade type. The connection between two cable meet IP68 waterproof. You can bury the cable to the ground.
We would suggest you not adding more than 50 meters DC12V cable. The power loss will become serious as the cable is getting longer.
You also need to verify the WiFi signal as you have long distance from the camera to your home network. The camera rely on your home WiFi signal to live stream the video.
The PoE IP nest box camera provide 100 meters power over Ethernet, but the cable need to return to your router or any RJ45 network port nearby.