Dual-frequency design, whistle has three kinds of sounding, the sounding cavity of different frequencies on the left and right sides, and the high-low frequency sound is generated at the same time, ensuring excellent penetrating power under different environments and conditions. Professional outdoor life-saving whistle, High and low sound design, with a back clip, you can easily clip it on clothes and bag, the tail hole can also be worn with ropes, necklaces, key chains, etc. can be stringed on the rope hanging on the backpack.

Features:

• Run a resistance designed mouthpiece. You can use your mouth without holding it, don't worry about the airflow to blow out the whistle, non-metallic materials, and avoid damage to the mouth and teeth.
• Dual-frequency high-bass whistle uses food grade PP (polypropylene) Plastic is another excellent resin variety developed after nylon, non-toxic, no harm to the human body.
• Waterproof camping whistle, suitable for all weather, rainy days, wet weather, easy to carry, can be used for outdoor survival and training
• Used for rescue and field rescue in the wild, is a must-have equipment for your friends.