It's a plastic whistle, like the ones that were found in some cereal boxes forty years ago. It emits a note at 2600Hz, which coincidentally was the frequency f

It's a plastic whistle, like the ones that were found in some cereal boxes forty years ago. It emits a note at 2600Hz, which coincidentally was the frequency for carrier control on the Bell phone network at the time. See: http://en.wikipedia.org/wiki/John_Draper#Phreaking http://en.wikipedia.org/wiki/John_Draper#Phreaking