Coghlans Four Function Whistle
Coghlans Four Function Whistles are ideal for use both on land and sea, in the harshest of conditions.
Manufactured from black HDPE plastic, these tough whistles incorporate a small directional compass, a magnifying lens, and a thermometer with °F / °C scales. The clip attachment on the reverse allows these whistles to be connected to zips or other pieces of equipment for quick reference.
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