Sony MDR-ZX110NC ZX Series Noise Canceling Headphones - Black

Noise canceling technology for up to 95% less noise30mm drivers for rich, full frequency response115 dB/mW (when power is on) 110 dB/mW (when power is off) Up to 80-hours playback from one AAA batteryCan be used as standard headphones without batteryHigh energy magnets deliver powerful bass and clear trebleLightweight and comfortable on-ear designSwivel-design for portability47 ¼ in. (1.2 m) tangle-free, Y-type cord