Product name: High frequency double tube survival sentinel
Material: Aluminum alloy material, plastic core
Weight: About 13.5g
Color: Silver, gold

Packaging: opp bag independent packaging

Peak volume: about 120dB
Surface treatment: oxidation + sandblasting
Specification: Length 55mm× width 15mm× thickness 8mm

【 Feature 】
1, light, and equipped with key chain, easy to carry;
2, larger caliber, louder whistle, outdoor necessities for help;
3, aluminum alloy material, the surface using anodic oxidation technology to color, do not fade, longer service life.

Scope of operation of survival sentinel:
Survival whistle does not have to be used when in distress, such as to say hello to the front and back, determine how far away it is, determine the direction of the other party's sound source, etc... However, there is a problem in this, is that sometimes when climbing the mountain just rise up and blow the whistle, blow too much, everyone does not feel anything, hear others blow also do not want to blow, and walk on their own, then once someone's foot twisted, or where they need help, or the new donkey pulled far in the middle does not know how to go when they meet the intersection, When no one responded to the whistle, it was a very anxious thing, because the others still thought that nothing had happened, and they were busy silently working hard to pull the mill, and there was not much time to take notice, like the story of the Wolf.