Sennheiser HD 25 - professional headphones, dynamic, closed

Package contents: Adapter 6.35 mm x 1 | Package contents: Headphones | max SPL: 120 dB | Harmonic distortion (THD): 0,3 % | Warnings: Do not disassemble or modify the product yourself. | Warnings: Read the user manual before use. | Impedance: 70 Ω | Weight: 140 g | 3.5 mm (1/8-inch) in: 1 | Transducer type: Dynamic | Cable colour: Black | Product type: Headphones | Recommended usage: Studio | Headphone frequency: 16 - 22000 Hz | Acoustic system: Closed | Ear coupling: Circumaural | Product colour: Black | Connectivity technology: Wired | Cable length: 1.5 m | Wearing style: Head-band