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 
1 x Lanyard  (Random rope)
1 x Storage Box (Box color random)

Notes: 
Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the pictures. 

We're dedicated to delivering your purchase as quickly and affordably as possible.

We offer a range of delivery and pickup options, so you can choose the shipping method that best meets your needs.