The Altec Lansing MZX657 True Wireless Bluetooth Ear buds are revolutionizing the way you listen to your music. High caliber audio performance is produced via 10mm dynamic drivers. The MZX657 also features advanced bluetooth technology to stream music and answer phone calls effortlessly. Certified IPX7 waterproof rated, these ear buds can be immersed in water or handle any water-related workout. Never worry about missing a call with the onboard microphone and song navigation/telephony/volume control buttons. Powered with 6 hours of battery life, you can count on the MZX657 to play studio quality sound during any demanding workout. It comes fully packaged with 3 sizes of ear tips, charging cradle, case, and a built-in GPS to locate the earbuds in case they get lost.