Cephalometer (Illithid)

This psionically empowered caliper measures a creature's head size via two inwardly curved, iron projections. These projections are connected at one end with a bolt that allows them to open or close. In addition, the caliper wielder can use dominate person and feeblemind (DC 17) each once per day on any willing or subdued creature whose head is between the projections. Fitting the calipers to a subject's head provokes an attack of opportunity.
In addition to the two powers noted above, a cephalometer applied to the head of a willing or subdued subject can conduct a mind probe once per day for up to 10 minutes. All the subject's memories and knowledge are accessible, from memories deep below the surface to those that are easily called to mind. The wielder can telepathically pose one question, and the caliper extracts the answer from the subject's brain and relays it directly to the wielder's mind. These answers are to the best of the subject's knowledge. The wielder and the subject do not need to speak the same language, though less intelligent creatures may yield only appropriate visual images in answer to questions. The cephalometer may be used to probe a sleeping subject, though the subject may attempt a DC 17 Will save to wake after each question. Creatures protected by mind blank or those that are not affected by mind-affecting effects are immune to this mind probing.
Moderate enchantment and divination; CL 9th; Craft Wondrous Item or Craft Universal Item, dominate person, feeblemind; Price 36,450 gp; Weight 1 lb.
Source: Underdark