factory direct sales metal lifesaving whistle referee special whistle

product description
material: iron, surface plating treatment (nickel plating and chrome plating) lanyard: nylon/bead necklace
packing: abs transparent box packing. 10 pcs/box, 40 boxes/box 400 pcs/box
applicable:
1. asking for help and warning-suitable for wild exploration, women, lonely travelers, children, and sea rescue!
2. warning, command-traffic police, security, vehicle scheduling management, etc. 3. outdoor contact-(traveling with a companion out, one person, coding the flute in advance, then you can communicate at a long distance), suitable for outdoor sports
4. competitive competition-suitable for all kinds of sports competitions for judges
5. use of other purposes
features: strong and durable, two-tone sound, unique loud sound, how much your lung capacity is, how big the sound can be, lanyard type, high strength, easy to carry, avoid loss, can be worn into other items such as keys