Crank up the music with the Altec Lansing MZX667 Evolution Bluetooth Headphones. Equipped with large format 40mm neodymium drivers, an On-board microphone, 30 feet wireless range, 12 hours and song navigation / telephony buttons, you're ready to enjoy hours of your music while never worrying about missing a call. In addition, dual 3.5mm connectors make it easy to share your favourite tunes with your friends and family so they too can enjoy a superior listening experience.