# Signal Whistle *Adventuring gear* - **Cost**: 5 cp When blown as a [Utilize](Mechanics/CLI/rules/actions.md#Utilize) action, a Signal Whistle produces a sound that can be heard up to 600 feet away. *Source: Player's Handbook (2024) p. 228. Available in the <span title='Systems Reference Document (5.2)'>SRD</span> and the Free Rules (2024)*