Rescue Metal Whistle- 2 PackWhen you need rescuing, one of the easiest ways rescue crews can locate you is by sound.  The Adventure Medical SOL Metal Whistle emits a 110db shriek that will bring them in quickly.  Features:110dB whistle signal is audible over a great distancePea-less design works in all conditions - won't freeze or stickThe ultra-portable design weighs only a few grams and fits in any pocket*Sold as an IndividualWARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.