These open-back headphones, known for their robust and high-end design and clear, high-quality sound, are priced around 30,000 yen. While the original cable is not included, a third-party 4.4mm balanced cable will be provided. The outer box, case, and other accessories are not included. Overall, the item is in excellent condition, and of course, there are no performance issues. If you purchase this item along with the hiby or ibasso DAP I am also selling, I will offer a 5,000 yen discount on the total price. Please let me know in the comments section if you are interested. The following is an excerpt from the website for your reference: Gold Planar, a well-known brand in the HIFI industry, was founded in 2010 by this core team to design and manufacture high-quality HIFI-level earphones. Gold Planar was established in 2017 and became a manufacturer of original HIFI earphones. Gold Planar aims to create the best series of headsets (headphones). To date, Gold Planar has designed planar magnetic drivers that exceed modern standards based on many years of knowledge and experience. The Gold Planar GL600 is a reference tuning headphone from Gold Planar, equipped with a planar magnetic driver with Gold Planar's specialized 66mm nano-diaphragm. This driver has been modified from other standard driver manufacturers. The board inside has been reset to increase the surface area and airflow of this driver. This level of upgrade allows the ultra-thin nano-diaphragm to respond faster, creating a more realistic sound field across the full frequency range, and improving sound resolution. The metal parts of the Gold Planar GL600's headband are made of aviation aluminum. In addition, it is made of leather. Our hope is that users can enjoy HIFI music for a long time. Therefore, we have focused on a lightweight headband and housing, and this headband has better durability. These headphones fit the head very well, which is an excellent aid to the excellent sound quality of the Gold Planar GL600.