Medallion of Thoughts

From Dungeon Master's Guide, page 181. Found on Magic Item Table F.

Description
''Wondrous item, uncommon (requires attunement). 1 lbs.''

The medallion has 3 charges. While wearing it, you can use an action and expend 1 charge to cast the Detect Thoughts spell (save DC 13) from it. The medallion regains 1d3 expended charges daily at dawn.