UST JetScream Floating Whistle Yellow. The pea-less design won't freeze clog or rust and is just as effective when wet. Specifications for UST JetScream Floating Whistle: Manufacturer: UST Color: Yellow Additional Features: One of the loudest of its kind - 122Db Weight: 0.4 oz Package Contents: UST JetScream Floating Whistle At 122dB the jetscream floating whistle can be heard over most natural and man-made noises.