Features 1. 1. Excellent coating and exquisite craftsmanship make this electronic whistle have an ABS shell and a crack-resistant sturdy design. 2. 2. Improve the hygiene of multiple users without whistling. 3. 3. Three kinds of frequency switching, suitable for all sports events, and alarm in case of an emergency threatening personnel. 4. 4. The sound is loud and penetrating. 5. 5. Multi-color optional, it is also equipped with a portable black rope. 6. 7. Specification: 8. Name: Electronic whistle 9. Weight: 68g 10. Color: red blue yellow 11. material: plastic 1 2. Size: 14*4cm 1 3. Applicable scenarios: fitness equipment, hiking, mountaineering, camping, foot basket sports, other ball sports 1 4. 1 5. Package included: 1 6. 1*whistle 1 7. 1*lanyard Specification Package List