1. SONY like no other MDR NC50 SPECIALTY Category Subcategory General data Type Driver unit Sensitivty NC power on off Impedance NC power on off Magnet Frequency response Power handling capacity Noise reduction effective range Noise reduction rate Power source Power switch Battery life Headband Cord Cord length Plug Volume control Noise canceling ON OFF switch Foldable Weight of headphones Noise Reduction Supplied accessories Package Style Dimensions WxHxD in cm Package per Carton Noise cancelling Closed Dynamic 40mm 102 100 dB mW 40 100 ohms Neodymium 14 22 000 Hz 100mW 40 1 500 Hz More than 10dB at around 300 Hz DC 1 5V or 1 AAA battery Manual Approx 30H with 1 AAA battery Adjustable double band OFC single sided detachable 1 5m L shaped gold plated stereo mini plug ON OFF switch on housing Swivel Approx 290 g including AAA battery 80 Eliminates 4 5 of noise Carrying Case Inflight Plug adapter Unimatch Plug adapter 1 5m connecting cord Box 42 2x30 2x28 3 4