Dudao X21 wired headphones with 3.5mm mini jack Over-ear headphones with a 3.5mm mini jack connector Excellent sound quality – Long hours of testing allowed for the proper balance of the headphones ' sound, resulting in a clear and stable sound , both in the case of low and high tones. Exceptional comfort – The soft sponges of the earpieces ensure the highest possible comfort of use . Hours of listening to music without pain and fatigue . Plug like gold – Gold-plated 3.5mm jack plug is resistant to abrasion and oxidation . In addition, it reduces the loss of sound quality. Specification: Brand: Dudao Model: X21 Headphone type: Over-ear, wired Material: ABS + PC Headphone frequency response: 20 – 20,000 Hz Connector type: miniJack 3.5 mm KGO: PLN 0.02 net