Partially Assimilated Servo Unit

The Altered 25th Century Communicator is a special event trinket that summons a Pet to aid the Player Character.

Using the communicator will grant a 5% Health buff for 30 seconds and summon a security robot from the future that will chat with you about various topics.

Source
The Altered 25th Century Communicator trinket was only given to Players with Legendary-level access on December 2015.

Servo
Servo is summoned on activation in addition to a 5% Health buff for 30 seconds.