The Audio-Technica ATH-MSR7NC is a pair of headphones for real audiophiles. With a frequency range of 5 to 40,000 Hertz, these headphones fall into the Hi-Res category. Treble sounds crystal clear; low tones are tight and detailed. Thanks to active noise canceling, disruptive ambient noise and white noise are dampened. This makes these headphones suitable for use in the train, on an airplane, or at work. The sound of talking people or the humming of an airplane engine disappears into the background. Listen to music for 30 hours with noise canceling and then charge them using a micro USB cable. Store the headphones in the pouch after use.