Dynamic earphones with a 9.8mm driver, achieving clear sound quality. - Model Name: ATH-CKR30 - Driver Size: 9.8mm - Impedance: 16Ω - Maximum Input: 200mW - Cable Length: 1.2m - Included Earpieces: XS/S/M/L - Dynamic Type: Dynamic Driver Brand new, unopened. Shipped via Mercari delivery. Thank you!