aluminum alloy outdoor dual-frequency whistle outdoor mountaineering outdoor survival whistle equipment wholesale

Material: Hard aluminum material
Color: Silver, gold, black, customizable
Surface treatment: Hard oxidation
Specifications: Length 56mm * Width 15mm * Thickness 8mm
Packaging: OPP bag
Boxed: 2000 per box
Weight: 10g
Features:

1. Unique whistle design; the overall style is innovative, high-frequency, and loud when blown lightly.
2. The double-hole design produces a sound level of 80–120 decibels, ensuring its performance remains effective even in harsh environments.
3. Made of aluminum alloy, safe, high performance; overall reflects a rugged outdoor style.
4. A carefully designed cut design enables air vibrations to produce higher-frequency sounds that can travel farther.
5. Compatible with keychains, lightweight, easy to carry and use.

Direct sales from the factory, very competitive pricesBy operating with integrity, customers can feel at ease.Quick customization of products, with guaranteed quality.