XS Scuba - Wind Storm™ Safety Whistle TUSA Add Duo Air 2 Use the Hs on the

Use the Hs on the webbing to line up on each side to ensure the perfect fit

Each 1st stage has three medium pressure ports and one high pressure port

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

The design of the nose pocket makes it easy to equalize while descending

XS Scuba - Wind Storm™ Safety Whistle TUSA Add Duo Air 2 Use the Hs on theThe 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