B-Stock, Sennheiser HMD-300 Pro Headphone- closed, over-ear, impedance: 64 ohms, Sensitivity 108 ±3 dB SPL / 1 V rms / 1 kHz, frequency response: 60 -25000 Hz, distortion < 0.1 % @ 1 kHz- 100 dB SPL, load rating 500 mW, Contact Pressure 6.0 N ± 0.75 N, microfone: transducer principle Dynamic, hyper-cardioid, Frequency response 80 Hz - 16 kHz, Output Voltage 0.4 mV/Pa @ 1 kHz, Impedance 300 ohms, wind and pop screenone included, one sided cable run, cable not included, optionally #448025 or #448028, weight: 319 g without cable, B-Stock with full warranty, may have slight traces of use