Cycle whistle BOOKMAN
The Bookman Cycling Whistle was created on the basis of collaboration with the world-renowned whistle producer Acme from Birmingham, founded in 1870. It was developed specifically for the comfort and safety of cyclists.
The ACME Tornado whistle operates on the principle of wave interference - meaning it can produce high volume without any moving parts. The shape of the whistle also prevents the user from inhaling in the event of a fall .