If you get lost or are in danger outdoors, make some noise to get some help with these survival whistles. Available in assorted colors, the 2.13″ x 0.38″ high quality aluminum alloy whistles feature metal keychains that can hang on belts, backpacks, or lanyards. The dual tube whistles can emit 80 to 120 decibels with high frequency, long distance transmitting sound. Ideal for boating, fishing, camping, hiking, hunting, animal training and more. Add a brand name, logo or message to customize. Orders of 10,000 pieces or greater are eligible for sea shipping. Minimum order quantity is 50 pieces.