iSwimband is the world's first wearable sensor designed to alert you with an audible/visual alarm on your smart phone or tablet (and linked speakers) if a swimmer has been submerged dangerously long, or if your non-swimmer unknowingly enters the water.
Larsen Design Engineering worked with Aquatic Safety Concepts on the detail mechanical design for the first production launch of iSwimband. Recently, ASC has returned to Larsen Design Engineering for the second generation design development.