I purchased these as monitor headphones, but I'm selling them because the size and sound didn't suit me. I've only used them for a few hours at home, so they're practically new, but I would appreciate it if you understand that they are used. Retail price: 21,300 yen ※ The following is quoted from the Sound House official website ＜Specifications＞ ■ Type: Dynamic, closed-back ■ Impedance: 45Ω ■ Frequency response: 10～30,000Hz ■ Sensitivity: 100dB ±3dB ■ Accessories: Straight cable, coiled cable, conversion adapter, carrying case