Medallion of Thoughts
Wondrous Item, uncommon, requires attunement · 2024 rules, SRD 5.2
The medallion has 5 charges. While wearing it, you can expend 1 charge to cast Detect Thoughts (save DC 13) from it. The medallion regains 1d4 expended charges daily at dawn.
Also in the 2014 rules (SRD 5.1).