TOM-Bot Device

The TOM-Bot is a special event trinket that summons a Pet to aid the Player Character.

Designed by T.O. Morrow himself with stolen 25th century technology, TOM-Bot is a superior battle companion, as Morrow himself would tell you. TOM-Bot will entertain you with T.O. Morrow quips, help in fights with a special Quantum attack, and provide a small health buff while active.

Source
The TOM-Bot trinket was only given to Players with Legendary-level access on December 2013.

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

Updates
Since game update 25 this item cannot be used in PvP arenas.

Trivia

 * TOM-Bot is voiced by Jens Andersen.