Best-in-class Sound Quality:JBL Wave Buds 2 earbuds feature 8mm dynamic driver which is engineered to produce rich and deep bass tones without overpowering mids and highs creating a well-rounded sound profile.ANC with Smart Ambient :JBL Wave Buds 2 earbuds come with Active Noise Cancelling to listen to your surroundings and filter out distracting noise. Smart Ambient lets you control how much of the outside world you want to hear, so you can talk with others or stay aware of your surroundings—all without taking your earbuds out.