It's got a closed ear design for maximum bass and isolation, collapsible construction for maximum portability, a wide frequency response of 18 Hz-20 kHz, and accurate sound, with deep bass and clear, precise treble response.

Additional features: straight, single-entry 8 ft. attached cable (left side); terminates in 3.5 mm miniplug (no 1/4" adaptor); volume control on cable; 100 ohms impedance; sensitivity is 101 dB SPL/1mW, with distortion of <0.2%; weight is 12 oz.