7Pcs Aluminum Whistle Aluminium Alloy Survival Extra Loud with Lanyard for Training Pet,Sport Referee, Hiking, Camping

1.MATERIAL:The whistle is made of high quality aluminum alloy,surface anti-oxidation treatment, no fading, no rust and durable. 2.DESIGN FEATURE:The notch design of the whistle increases the vibration frequency of the air, the high frequency is louder (about 120 decibels), and the transmission distance is long. 3.EASY TO CARRY:The whistle is small and light. Each whistle is equipped with a key ring and a lanyard. You can hang it on the key, bag or neck. 4.APPLICATION:It is suitable for dog training, referees, coaches, lifeguards, school sports, military training, emergency situations, etc. It is also suitable for camping, hiking, boating, outdoor climbing, etc. Very useful in various emergency situations, allowing others to quickly confirm your location and rescue. 5.PACKAGE:7pcs aluminum whistles with 7pcs lanyards.