This Knight in ghostly armor headphone provides a clear and precise and perfect its insulation. With his bow, simple and fully adjustable design, this headphone is suitable for all body types. The integrated microphone and answer button allows the management of telephone calls. The headset is compatible with all generations "smartphone" with a 3.5 jack Specifications: Microphone + button response Connector 3.5 mm jack diameter of 40 mm speaker Sound pressure level 108dB Impedance: 32 ohms Frequency range: 20-20 000Hz Cable length: 1.20 m