This item was purchased from the official website on July 21, 2025, and was stored unopened for a long period. It was then opened to confirm functionality. Only the sound output of the main unit, including the cable, has been tested. Support is available within the warranty period, and proof of purchase can be provided if needed. Sundara Closed-Back Closed-Back Headphones Brand: HIFIMAN Structure: Closed-back Wearing style: Over-ear, integrated left and right Headphone type: Headband Color: Brown系 (Brown-toned) Headphone features: Detachable cable Low-frequency response (Hz): 6.0 Hz Wireless/Wired connection: Wired Driver type: Planar magnetic Plug shape: Standard plug/Mini plug Impedance (Ω): 20.0 Ω Sensitivity (dB): 98.0 dB Weight (g): 432.0 g =============== Returns and cancellations are not accepted. Shipping costs will be discounted if purchased with other items. Please comment if you wish to combine purchases. Bulk purchases, exclusive listings, and various event support are available (category changes, relisting, etc.). This item is also listed elsewhere, and may be removed without notice if sold. #hifiman #hifimansundara #closed #back #stealth #planar magnetic #planar magnetic driver #closed-back #headphones