This is the ATH-CKS90 from audio-technica. The specifications for the headphones are as follows: Type: Dynamic Driver: φ13mm Output Sound Pressure Level: 106dB/mW Frequency Response: 5～25,000Hz Maximum Input: 100mW Impedance: 16Ω Weight: Approximately 9g (excluding cord) Plug: φ3.5mm gold-plated stereo mini L-shaped Cord: 1.3m Includes a pouch. The manufacturer's suggested retail price was 13,200 yen (including tax). It will be shipped in a cushioned envelope via Rakuraku Mercari delivery. Series...AHT Series