The whistle Doug packs in the PSP is made by Fox40, it's the Micro Fox40. I carry one in blue color on my keychain. I was at the doctor the other day and he asked me if it's a dog whistle, the kind that produce a sound that's out of the frequency range of humans. I told him the truth, that it's for emergencies and that I don't have a strong voice... He said don't worry if you're ever in an emergency you'll find the strenght to shout...

Frankie