Package contents:
    *MDR-NC600D Headphones
    *AC Adapter (100-240V)
    *Airline Plug Adapter
    *Carrying Case
    *Plug Adapter
    *Detachable cord (1.5m and 0.5m)
    *Cord with battery case
    *Battery

Supplied AC adaptor (to charge the headphones) will work at 100 to 240 volts (worldwide).

Specifications
    * Reduces noise by 99% when noise canceling circuit is switched on
    * 40mm driver units produce powerful sound with space left over for the sonic isolation of these silicon designed ear buds
    * Ideal for music lets you listen to music through the headphones, while the noise canceling circuit reduces outside sound
    * Lithium Ion Rechargeable battery is built into the headphones and can be charged with the supplied AC adapter. Also comes with a battery case for use with normal batteries
    * Sensitivity 102dB/mW (when power is on)
    * Frequency Response 5-24,000Hz
    * Maximum Input 100mW
    * Cord length 0.5m and 1.5m (1.5m cord with battery case included)
    * Weight: 225g