Security System

The  is a Dynamic introduced in the 16.0.0 update.

Appearance
It appears to be a police-themed, blue and red safe. It has a blue star symbol on its side.

Use
Apparently, none. Normally, other Dynamic craft items are supposed increase the chance of pets dealing critical damage. However, according to its description, it recites the name of this craft item, instead of what it would supposedly do.