2Pcs Outdoor survival high-frequency whistle

High-frequency double tube survival whistle

Color: high-grade matte black, one-color silkscreen

Size: 5.5*1.5*0.8CM

Peak volume: 120dB

Material: aluminum alloy

Weight: 10 grams

Packing: transparent OPP bag

Product features: whistle sound is crisp and loud, transmission distance is far for calling for help, recruiting companions, wildlife, and other ring mirrors; hanging can be hung on tents, equipment, water bottles, backpacks, keyrings, and other accessories; Wearable, practical and convenient