These 100% Waterproof earphones were designed for stability and high audio quality. 4 different ear-tips are provided for perfect fit with your ear canal, including the triple action silicon set designed for lap swimming. Development of this product incorporated feedback from thousands of our customers over many years and audio quality was rated the highest by Swimmer, the official magazine of US Master of Swimming. The long 40″ wire was designed for arm/body mounting. Ideal for all water sports, outdoor, recreation and fitness activities. Swim, Jog, Dive, Ski, Surf and Kayak. Compatible with all devices with 3.5mm jack including smart phones, computers, mp3’s.