It is a real thing and they are produced by a company called Cellebrite. They are used in digital forensics. So if they get your phone confiscated or whatever, they can plug the funky looking police tablet and hack it.

It's real! It has a dozen different plugs for different phone models, and it can make a dump of the physical memory of the device, allowing you to read messages, files etc... without having to unlock it.

I used to work for a PI who used it, he was an incompetent piece of shit but the tech was fun to play with.