Horn of Silent Alarm

Wondrous item, common

This horn has 4 charges and regains 1d4 expended charges daily at dawn. As a Magic action, you can blow the horn while expending 1 charge. One creature of your choice hears the horn’s blare, provided that creature is within 600 feet of the horn. No other creature hears the horn.

Source: Dungeon Master’s Guide (2024) p. 270