Features:
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.
Suitable for personal or professional use.
Can be applied for basketball, football, volleyball etc.
Descriptions:
3.74KHZ and 4.10KHZ mix wavelengths, making the sound quality of steel and penetration.
Specifications:
Material: ABS+ titanium alloy + polymer material + rope
Color: blue
Package included:
1 x Authentic Referee Whistle