The Liberty Air 2 Pro was designed to sound great, even with noise-canceling turned on. To do this, Soundcore engineers developed PureNote driver technology, that utilizes ten hardened nano layers to make up the 11mm driver in each earbud, offering accurate sound and clarity at all frequencies. Soundcore then worked to tune the earbuds, both with ANC turned on and off, to make sure that music always sounded like artists originally intended.