HEDD HEDDphone, Headphones, Open design, Over-ear design with Air Motion Transformer driver (electrodynamic converter), Power: 87 dB / 1mW, Impedance: 42 Ohm, Frequency range: 10 - 40,000 Hz, Weight: 718 g, Includes 2.2 m cable with 6.3 mm jack plug / 4-pin Mini-XLR