Features • Fold-up Design - Portable fold-up design, match with nano material storage bag, portable and convenient to store • Adjustable headband - Flexible and adjustable with memory scale to ensure each head style has the best wearing way • Adaptive ear muffle - Bidirectional adaptive ear muffle enhance low frequency audio performance to make comfortable long time wearing • Piano baking varnish - Surface piano baking varnish to make the headphone durability and brilliant color never fade • Steel reinforcement - Delicate moving parts steel reinforcement to enhance headphone long service life • Protein ear cotton material - Protein skinfriendly material, comfortable and breathable, won’t skin allergy by long time usage • Unique flat cable - Unique flat cable design, high-elastic TPE material makes it won’t wrinkle and knot • Plug-in audio cable - Plug-in audio cable design, 24K gold-plating, reliable connection and not easy to breakdown