Sell [M-M] Professional Referee Teacher Coaches Whistle for Basketball Football Volleyball best price

Specifications: 3.74KHZ and 4.10KHZ mix wavelengths, making the sound quality of steel and penetration. A unique double chamber design that produces 2 different high waves. Made of ABS material, high strength, very durable for use. Portable size, easy to carry and use. Can be applied for basketball, football, volleyball, etc. Item Name: Referee Whistle Material: ABS Lanyard Length: 85cm/33.46" (Approx.) Dimension: 6cm x 2cm x 2.6cm/2.36" x 0.79" x 1.02" (Approx.) Notes: Due to the light and screen setting difference, the items color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Referee Whistle 1 x Storage Box(Random Color) 1 x Mouth Grip 1 x Finger Grip 1 x Lanyard