Sony Wired Noise Canceling Headphones Black MDR-ZX110NC

Included items: Single 4-type manganese battery, aircraft plug adapter Model: Closed dynamic type Driver unit: 30mm dome type Sensitivity: 115dB/mW (when powered on), 110dB/mW (when powered off) Magnet: Neodymium Playback frequency band: 10Hz - 22,000Hz Impedance: 220Ω (at 1KHz) (when power is on), 45Ω (at 1KHz) (when power is off) Cord length: approx. 1.2m/cord type: Y type Power source: AAA batteries Has noise canceling function