AUR Audio Hermit Used for approximately 30 hours. Only the main unit has been used. Glass coated and in beautiful condition. Please understand that the listing may be removed suddenly as it is also listed elsewhere. This is a high-end model alongside AuR Audio's AEhta. Driver Configuration: Sub Bass (2) Sonion Dual Woofers Mid Bass (2) Sonion Bone Conduction Drivers Midrange (2) AR Audio Custom Midrange Drivers Treble (4) Knowles Dual Tweeters Specifications: Frequency Response: 20 Hz - 20 kHz Impedance: 7Ω @ 1 kHz Sensitivity: 106dB @ 130mV THD: < 1% @ 130mV Shell Material: 3D printed medical-grade resin neon pro Accesion aurora aehta alsa