Description
Item Description:
High-frequency Survival Whistle with Double Cavities.
Porpuse:
To gather team members, to call someone, to call for help, to strengthen the security level in outdoor activities, esoecially in emergency.
Size:
56x15x8mm
Weight:
11g
Material:
High strengthen aeronautical aluminum alloy.
Bright Spots:
Two cavities shaking together make it much louder than an ordinary whistle, and reach 118dB at maximum.
With high frequency of 3-4KHz, voice of the High-frequency Whistle with Double Cavities can go much further.
Using High-frequency Whistle with Double Cavities can help to save at least 30% of your labor than an ordinary one.
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