YI-5
From Wookieepedia, the Star Wars wiki.
The YI-5 interrogation droid is similar in design to the IT-O droid. It is shaped approximately like a remote, with a hovering, approximately spherical body. In addition to conducting interrogation semi-autonomously, a YI-5 droid can track down a subject in the manner of a seeker. Such droids are fitted with stealth fields that enable them to blend in with the approximate color of their surroundings.
This type of droid was commonly employed by the ISB during the days of the Galactic Empire.
