You gain the knowledge of how to create any mundane technology in Star Trek, anywhere in the timeline from Enterprise era to the Star Trek Online era. From warp drives to matter replicators to Borg cubes you can make it all. You can also synthesize any material from Star Trek, such as Transparisteel, Dilithium, and Tritanium.
You can't use any technology or psychic abilities demonstrated by Star Trek's many "god-aliens," but very advanced mundane civilizations such as the Iconians, The Borg, and STO era Federation are fine.