Korg NC-Q1 Black, Noise Canceling Headphones, Active noise canceling, Up to 36 hours of operation, Closed, Circumaural, Frequency range: 10 - 25000 Hz, Detachable 1.5 m cable with 3.5 mm mini jack plug, Rotatable ear cups, USB 2.0 (for charging the battery), Bluetooth 4.1 (SBC, AAC, aptX, APTx-HD), Siri / Google Assistant, Smart monitoring and sound enhancing function, Weight: 321 g, Colour: Black, Includes carrying case, 6.3 mm adapter and USB charging cable