Superlux HMD-660E headset closed back dynamic headphones, 96dB SPL, 150 Ohms impedance, 10 - 30000 Hz, Input Power 300mW, dynamic Microphone, frequency range: 150 - 10000 Hz, Max SPL: 136dB, 3m spiral cable with 3.5mm stereo plug and adapter (3.5-6.3mm) for headphone and 3,5mm Plug for microphone. Weight: 220g (excluding cable)