Horn of Silent Alarm
Wondrous item, instrument (horn), common
This horn has 4 charges and regains dice:1d4|noform|noparens|avg (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