The technology varies over a period of 15,000 of its years which is what I have outlined. At the beginning of that period, the technology is much more advanced than earth's present technology, with a great energized sphere set in place around the world to protect from radiation and hostile invaders. At the lowest point during that period, it's about copper-age technology. At the end of that period or 'modern' times, the technology is roughly comparable to early 1900's, but operates differently.