XS Scuba - Wind Storm™ Safety Whistle TUSA Add Duo Air 2 System of Measurement Metric -

System of Measurement Metric - Imperial

the Duo integrates an extremely sturdy tempered safety glass lens that stands up to continued wear and abrasion

This provides two benefits:

The Safety Pocket attaches to any 2 inch webbing or it can be clipped to the front of a BC

or communicating with fellow divers

XS Scuba - Wind Storm™ Safety Whistle TUSA Add Duo Air 2 System of Measurement Metric -The Wind Storm whistles outperform all of the other leading brands of whistles. It even works underwater, up to 50 ft (15. 25 m). Performs in all conditions, in any weather Can be heard on land up to 1 2 mile (804 m) away! Can be heard underwater for a distance of up to 50 ft (15. 25 m)! SOLAS Coast Guard approved