Adventure Medical Kits Rescue Howler Whistle 2PK
The Slim Rescue Howler weighs only a few grams but it packs a big punch - namely, a 100dB signal that is audible from over a mile away. The pea-less design means this whistle works in all conditions and will never jam or freeze.
Weight: .5 oz
Size: 2 1/8" tall x .25" wide
Check out the HOWLER in action here.