Binboll Survival double Tubes Emergency Aluminum Whistle vastar whistle rape whistle/Key Chain for Camping Hiking Price:  $11.99 (as of 30/03/2022 10:59 PST- Details)

Double tube and crisp sound, you can use it in any life-saving environment.
Maximum sound intensity of up to 118 decibels, can be heard for far distance.
Made of premium metal material.

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