Quality: Stainless Steel Whistles，Made of durable stainless steel, never gilded, durable, suitable for competition in various environments
Easy to use: The separate design of the lanyards makes it easier to use, disassemble them for easy access and quick storage.
Adapt to the crowd: they are all necessary tools such as coaches, referees, physical education teachers, rest workers, lifeguards, etc
Packing: 48packs
Scientific voice：Whistles with a pea are just easier to use,It's science! The pea affects the flow of air,Creating a loud shrill with less air pressure,Perfect if you're a little out of breath