Big bass meets smartphone conveniencewith its twin 30mm drivers and bass booster these headphones deliver big sound without breaking a sweat plus the in line remote with mic lets you take control of your smartphones music and callsdesigned to blast the bassthe bass booster amplifies the low end frequencies through a specially designed duct in the housing while an improved seal between the driver unit and your ears keeps sound inget the bass you crave from 30mm xb driver unitsenjoy enhanced