Adventure Medical Kits Slim Rescue Howler
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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. 100dB whistle signal is audible over one mile. Pea-less design works in all conditions - won't freeze or stick to lips when cold. Ultra-portable design weighs only a few grams and fits in any pocket - or attach it to a zipper pull. Dimensions are .875in x 2.25in x .3125in. Weighs .2oz each.