Sennheiser HD 25 - professional headphones, dynamic, closed

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