This is a new release from qdc. I purchased it from Bic Camera Online shortly after the release date. I used it for about 15 minutes after opening it, but it wasn't to my liking, so I'm selling it. I used different ear tips I had, so all the included accessories are unused. Universal IEM FRONTIER QDC-FRONTIER-AQ Aquamarine Brand: qdc Wearing style: Both ears, integrated left and right Headphone type: Canal type, ear hook, clip type Structure: Sealed Color: Blue系 (Blue-based) Wireless/Wired connection: Wired connection Headphone features: Re-cable Low-frequency range (Hz): 10.0 Hz High-frequency range (kHz): 30.0 kHz Impedance (Ω): 52.0 Ω Sound pressure sensitivity (db): 106.0 db Drive system: Balanced armature type, BA type Plug shape: Mini plug Cord length (m): 1.2 m