THIEAUDIO Ghost Wired Headphones Detachable Cable This is the THIEAUDIO Ghost. It is an open-back wired headphone. [Condition] Sound output has been confirmed. There is a scratch on the connection part of the headband on the left side. The original cable is included. ++++++++++++++++++++++++++++++++ ■ Product Overview • Equipped with a completely new and innovative 40mm sapphire dynamic driver, which is a thermoplastic polymer film stabilizer laminated with cermet (a composite material of ceramic and metal) • Sound quality tuned to match the acoustic characteristics of the auricle and ossicles • Adopts an open-back design, realizing a natural airflow across the acoustic cavity on the outside of the driver