This does NOT waterproof or weatherproof your indoor camera; ideally you should mount the camera underneath some cover (eaves, roof, etc.) if you mount this indoor camera outside! I do not take responsibility for any damage to your camera or USB cable, so use it at your own risk.

This is a cap to prevent moisture from entering the bottom of the Eufy Pan and Tilt Indoor camera (both 1080p and 2K models), when the camera is mounted upside on a camera wall mount. It should snap in place, but I recommend printing the bottom ~15% of the print to test how snug the fit is when printed on your printer before investing 7+ hours.

While obviously covering the bottom of the camera, the cap also accounts for the ring/nut used to tighten the wall mount arm that keeps it locked in position, and provides some cover the USB cable connection. The second pic shows the wall mount without the cap, highlighting the multiple openings that moisture could penetrate, if no protection is used.