✿ (Blue Yellow) ABS Resin Basketball Football Volleyball Whistle Refere AS
Feature: \n 1. ABS resin strengthened whistle mouth, environmental protection material, cold and hot temperature resistance, stable and chewy. Whistle original mouthguard, prolong the service life.\n2. Applicable to various scenarios, basketball, football, volleyball games, traffic guidance, military training and so on.\n3. Adjustable nylon hanger, hanger easily through the tail hole, double ball fixed hanger length, not afraid of losing, not afraid of falling.\n4. High frequency boom, lightweight and portable. Considering that human ears are more sensitive to the audio of 1000\u20114000Hz, the treble frequency is set to 4000Hz.\n5. Two independent sound holes. In a volleyball match, the referee is located in the middle of the court. The professional volleyball referee whistle, and the sound can be transmitted to both sides. \n\nSpecification: \n\nItem Type: Referee Whistle\nMaterial: ABS Resin\nFrequency: 0-4000Hz\nWeight: Approx.30g/1.1oz\nProduct Size: Approx. 49x20x13mm/1.9x0.8x0:
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