Properties: The whistle of every professional volleyball referee from the brand: Molten, model Deevo RA0100-K. Since the very introduction of this model to the market, it has become the first choice of professional referees around the world. Before being released for distribution, the whistle was tested numerous times to find the right combination of tone, resonance, quality and durability. The whistle's titanium construction is covered with high-quality, soft but resistant plastic. It has an extremely durable but soft mouthpiece. The whistle has a very strong, thick, sharp sound and a high tone of 125dB/10cm, 4.10kHz and 3.74kHz, 4 octaves. This model is intended for games and sporting events taking place in a room with a very large and loud audience. The whistle comes in a stylish box, making it an elegant, unique and functional gift for any refereeing enthusiast who appreciates the highest quality and unique style. The set includes: Professional whistle Belt