Lose the wires but keep the sound quality with the MEElectronics Air-Fi Matrix2. Using advanced 40 mm drivers with both aptX and AAC technology for the highest quality Bluetooth audio streaming possible, the Matrix2 provides full range sound that is rich, yet balanced, satisfying even the most discerning listeners. With Bluetooth 4.0, NFC connectivity, and an optional wired audio mode, the Matrix2 will keep you connected with your devices in any situation. A built-in high quality microphone and controls let you take charge of your multimedia and phone experience while an ultra-efficient Bluetooth 4.0 chipset provides up to 22 hours of talk and/or media playback time, 350 hours of standby time, and works while charging for uninterrupted use when the battery gets low. When it is time to put the Matrix2 away, the ear cups fold flat for storage in the matching storage case, protecting your investment.