R.E.K. 3000

The R.E.K. 3000  allows you to see your monster kill count, monsters around you and tells you if there is a rare monster near you.

Trivia
The R.E.K may stand for the words Rares, Enemies, Kills, the three displayed functions of this item. It may also be a reference to the term get rekt, a commonly used term, often used in regards to real life fails and kills in video games, referencing the monster-related info of this device.

The R.E.K could also be a reference to the Pip-Boy 3000 that's found in the Fallout RPG series, judging based off of the 3000 at the end of the name and the icon, which looks distinctively similar to the Pip-Boy that can be found in the Fallout games.