Lightweight design and adjustable earbands resist fallout, even with extreme movement. Create a custom in-ear seal with three sets of color-coded silicone tips, so your sound moves with you! The EB400 earbuds are certified 100% waterproof, and carry an official IPX7 rating. An eight-hour battery life means you can work - or work out - without recharging. Enjoy deep bass and lifelike detail in every note. At KICKER, incredible sound reproduction is our top priority!