2.25" Dynamic Speaker Element, High Efficiency Stronium Magnet, Stereo/Mono Selector Switch, Independent Left/Right Volume Control, Closed-Air Cushioned Earpiece, Adjustable Reinforced Head Band, Single Side Coil Cord-6' Long, Frequency Response: 20Hz-18kHz, Sensitivity: 105dB @ 1kHz, Impedance: 32 Ohms Nominal, 1/8" Mini Plug with 1/4" Plug Adaptor, Packed in Full Color Gift Box