PEACE AND QUITE NO STRINGS ATTACHED. The perfect combination of rich cutting edge technology, unique design, and exceptional sound quality to bring harmony to your ears. ANC removes low frequency noise from your soundscape, allowing you to focus on enjoying your music instead of being distracted by ambient noise. Phiaton’s active noise cancelling technology blocks up to 95% of ambient noise at 1kHz and below. The MS 530 long battery life provides up to: 30 Hours of Talk/Music time or 18 Hours of Talk/Music time (with the noise cancelling function “On”). Connects to two separate devices at the same time for seamless transition from device to device. Everplay-X technology allows you to continue calling or listening to your music, even if the battery runs out or your audio device is not Bluetooth compatible, making it the perfect headphones when traveling or using entertainment systems found in airplanes and trains. WHAT’S IN THE PACKAGE. Frequency Range: 20 Hz 20,000 Hz. THD: Less than 5% up to 1kHz. Sensitivity: 100dB at 1 kHz. Input Power: 1,000 mW. Weight: 0.64 lb / 290 g (Without cord). Communication Network: Bluetooth 4.0. Operating Range: Within 10 m. Call Time: 17 hrs / 29 hrs (NC on / off). Music Play Time: 18 hrs / 30 hrs (NC on / off). Standby Time: 49 hrs / 980 hrs (NC on / off). Full Charge Time: 2.5 hrs. Bluetooth Profile Support: HFP v1.6 / HSP v1.2 / A2DP v1.2 / AVRCP v1.6. Audio Codec: SBC, aptX. Clean, powerful audio performance with deep lows and crisp highs. Supra-aural (on-ear) headphone pair, though the earpads are large enough that it almost feels like a circumaural, over-the-ear pair. The pads are exceptionally comfortable as well. Phiaton rates the battery life for the Chord MS 530 at anywhere from about 17-30 hours when playing music-the low end represents the life with noise cancellation activated and the high-end without it turned on. What’s in the Box? Chord MS 530 M-Series Headphones. Inflight Adapter (2.5mm Double Mono Jack).