This must be some sort of early April Fools joke but evidently not. Unbelievable. Really not that expensive either although it would seem like an identical, cheaper round sans the actual camera would make those sighting in shots a little cheaper. Wait. This gives a whole new meaning to "sighting in".
And how is the image so stable. It should be going full circle ever 7 to 14 inches. That would make for a stomach churning image.
Right up there with the Sports Illustrated story of a pitching phenom named Sid Finch (back in the '70s IIRC).