The Major encloses vast amounts of the massive Marshall legacy. The exterior of the headband is made out of the same vinyl used in Marshall amplifiers and it bears the original Marshall texture. Besides being straight up dazzling. The Major is a solid workhorse with great stamina, designed with non-stop, all-day listening in mind. No matter how hard and heavy the music, the super soft cushions will rest lightly upon your ears. If you by chance would like to take The Major off of your head, they are foldable for easy storage and transportation. Microphone and remote for use with cell phone using 3.5mm plug unprotected two-way standard. The Major is delivered with a 6.3 mm adapter for use with with your amplifier, stereo or any sound source adhering to the 6.3 mm standard.Compatible with any 3.5/6.5 mm music player; Super soft cushions which will rest lightly on your ears; Foldable for easy storage and transportation. Microphone and remote for use with mobile phone using 3.5 mm plug unprotected two-way standard; 6.3 mm adapter for use with your amplifier, stereo or any sound source adhering to the 6.3 mm standard; Compatible with any 3.5 mm/6.3 mm music player. Transducer: 40 mm moving coil dynamic speaker. Sensitivity: 121 3dB at 1kHz 1 mW single speaker. Impedance: 32 15% at 1kHz. Frequency Respond: 20 ~ 20kHz. Set of Headphones: 6.3 mm. Adapter: Neutal stereo plug adapter. Colour: Black.