A really loud, flat whistle that you can comfortably carry in your wallet.About the Whistle:With a thickness of only 3 mm, the flat whistle fits in any wallet. Despite its flat design, it's really loud. It is also possible to wear the whistle as a chain or attach it to a keychain.Sound:It has a clear double tone. Due to the size, the sound is quite high. But it is enough to get attention. Dimensions:43 x 22 x 3 mm 

Designed by Jonas Daehnert and made in the USA under a CC BY-SA license.