World first WOOD True Wireless headphones with noise cancelling. The HA-FW1000T is the world's first to feature a wooden diaphragm. By combining it with a carbon-coated PET diaphragm, we succeeded in providing the outer periphery of the diaphragm with moderate flexibility and the central dome with greater strength. The result is a beautiful tone that only wood can produce. In addition, a stainless steel driver case is used for the driver, and the same grade material and technology as wired high-class earphones are used for the magnetic circuit. This helps eliminate sound clutter, achieving high-purity sound quality.