Aluminum alloy material, strong and durable with matte finish. Both of gold and silver color are available. Double tubes whistle provides up to 120 decibels noise, enough to be heard at a long distance. Small size make it easy to fit in your pocket or hanging with your keychain and bags. Be used in all-environment all-weather, rainy day, humid weather with excellent airflow design. Emergency survival whistle for expedition, camping, hiking, hunting, fishing, boating, swimming and many kinds of outdoor activities. Add an laser engraved of your company name or logo before your next promotional event for great brand exposure for your business. Great promotion gifts idea.
