1. HIFI HEAVY BASS:New wireless noise reduction technology, connection is simpler and faster, enjoy HIFI sound quality. 2.SOUND QUALITY UPGRADE:Imported granphene vibration film, vigorous heavy bass, more delicate sound processing, clearer sound quality. 3.COMFORT UPDRADE : Skin-friendly materia with ergonomic design, soft into ear, no swelling and pain when wearing, more stable and more comfortable.