Enjoy the all-day listening pleasure with soft, snug earphones that perfectly fit your ears. The IPX4 Waterproof rating protects the Defunc TRUE AUDIO earplugs from rain and sweat. Participate in a variety of activities, regardless of whether they involve water or not. These earphones have the ability to produce high-quality stereo sound, high-fidelity sound, and enhanced bass. They have a 30-hour playtime on a single charge and additional playtime with the charging case, so you can listen to music all day.