Post #1529821

Be wary, pea-based whistles will freeze up from humidity from blowing. And they won't work in the rain either. SOS has a non-lanyard one that's pealess, and idk where you're planning on deploying 500+ whistles but if it was in a cold area or a wet area they'll fail. And they probably will fail if blown on continually in dry conditions due to moisture as well.