【Product Name】High-Frequency Dual-Chamber Survival Whistle
【Principle】High-frequency dual-chamber resonance
【Features】Easy to blow and sound propagates far.
【Volume】118dB
【Material】Aluminum*Environmental Silicone
【尺寸】5.6cm*15mm*0.8cm

【Weight】11 grams

【Features】
1. Lightweight and comes with a keychain, making it convenient to carry.
2. Larger diameter, louder whistle, essential outdoor survival equipment.
3. The material is aluminum alloy, and the surface is coated with anodic oxidation technology to achieve a durable color that does not fade, ensuring a longer service life.

The whistle is made of silicone inside, individually packaged in an OPP bag. There are 200 pieces in each medium-sized package, and 2000 pieces make up one 21-kilogram large package. There are many colors to choose from, thank you.