HiFiMAN HE1000 Planar Magnetic Low Distortion Open-Back Headphones

I purchased these Brand New on 5/29/16 and maybe I put 20 hours on them tops .  Comes with everything just like you would buy new

                                                    

Technical Specifications :
• Transducer type: Planar magnetic


• Operating principle: Semi-open


• Frequency response: 8Hz - 65kHz


• Impedance: 35 +/-5 Ohms


• T.H.D: TBD


• Efficiency: 90dB


• Weight: 480g

Features:
• World’s first Nanometer grade thickness diaphragm. The
  incredibly low driver mass produces fast, effortless response with
  negligible distortion, two key elements to the ultimate goal of natural
  sound reproduction.


• Dual 2.5mm to 3.5mm mini jack cable


• Dual 2.5mm to 1/4" stereo TRS cable


• Dual 2.5mm to 4-Pin XLR cable


• Premium grade storage box


• Premium ear pads. Beveled pads that contour to the shape
  of the user’s head for superb comfort and extended listening as well as
  a good acoustic seal


• Calf’s skin headband


• High purity, oxygen-free copper (OCC) wire custom designed for wide frequency range