Reminder: Before purchasing this product, please check the product title and description on the detail page Compatible headphone models, avoid buying the wrong item;Please fill in the correct recipient information in English to ensure timely receipt of the product. The replacement of new earmuffs;High quality earmuffs, lossless sound; Products comply with European ROHS environmental protection requirements; Ear cotton sleeve Quantity: 1 pair=2 Pieces; Useful Tutorial link: https://www.youtube.com/watch?v=tIki4TYWdLU.