Lose the wires but keep the sound quality with the MEE audio Matrix2. Using advanced 40 mm drivers with 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. Rich wireless audio experience with deep bass, crystal clear vocals, and silky smooth treble. Advanced Bluetooth 4.0 technology with NFC, Multipoint connectivity, and aptX / AAC codec support for HD-quality audio. Built in microphone for headset functionality with controls for media and phone calls. Up to 22 hours of battery life for both talk and audio playback. Carbon fiber styling and expanded second-generation ComfortTouchTM ear pads. Frequency response: 10 Hz - 20 kHz. Sensitivity: 103 +/- 3 dB / 1 kHz. Impedance: 64 Ohm. Included: micro-USB cable, hard case and cable.