Smaller, higher pitch Guide Whistle, traditional double note, loud, 112dBA and needing little effort for a far carrying sound.
 
5.2cm long, high-pitch penetrating sound. Approved in 1909 by Lord Baden Powell and his sister Agnes, founders of the World Scouts and Guides. Unlike conventional whistles, the Scouts and Guides whistles have their own individual sound. They are exclusive to those groups and part of the tradition.