Whistle "Bobby" (nickel)

Signal whistle MILTEC STURM 16321000 WHISTLE BOBBY NIKEL PLATED - an exact copy of the historic Bobby Whistle (Bobby Whistle) British police. This product is perfect for security guards, military, sports referees, tourists, physical education teachers ...

FEATURES.
A lip whistle. The air supplied is divided into two streams: one goes into the environment, the other enters the chamber, increasing the pressure in it. After certain periods of time, depending on the size of the chamber, the second stream interrupts the main jet, as a result of which periodic compression and rarefaction of air occurs, propagating in the form of acoustic waves.
The police whistle bobby whistle has two weekends. By clamping them in a certain way, you can achieve different sounds or lack of sound. NOTE. The effectiveness of using whistles with a ball in a resonant chamber is lower than without it. The whistle with the ball makes trills, but its efficiency is significantly lower. It sounds quieter.
The product does not rust.
Ring for hanging on a cord or strap for wearing around your neck. NOTE. Lace not included.

SPECIFICATIONS.
Body material metal.
Nickel plating. Silver color.
Overall dimensions without the ring 74 mm X 16 mm X 16 mm.
Weight 14 g.

Packaging plastic bag with a cardboard label. Evroushko for ease of hanging on the stand.