Design and features:These earphones have an integrated microphone and tap sensitive music player function and call connect/disconnect controls for use with paired Bluetooth devices. Additional features include a right-side earpiece that can be used alone for one ear monitoring of Bluetooth streamed audio and telephone communications, support for Apple Siri and other Digital Assistant voice commands when Bluetooth paired to devices that have those capabilities, and manufacturer claimed water resistance. The Liberty Air comes with four pairs of ear pieces in various sizes, a USB charging cable, and a charging cradle/recharger battery/carrying case that the manufacturer claims can be used to recharge the earphone batteries up to three times between its own charges.
Sound quality: We found the Liberty Air delivers sound quality that falls in the Very Good range - it reproduces music and voice very well although it does have some noticeable sonic quirks. The overall sound can be summarized as somewhat bassy and a bit hazy and grainy. The bass (as in bass drums, bass guitars, stand-up bass, etc.) has good impact and goes deep, but is somewhat prominent and boomy. The midrange (voices, guitars, horns, etc.) is fairly even but a bit hazy and grainy. The treble (cymbals, the upper range of violins, etc.) is fairly extended, but is a bit smeared (sounds that should have a delicate shimmer sound blurred). This model does a decent job of recovering the room ambience of a recording (the sense of the acoustic space in which the audio program that's being listened to was recorded). The sound also has a decent sense of liveliness and is somewhat open--sound-wise it almost seems like you don't have anything plugging up your ears.
Comfort: As typical of in-ear models they produce a sense of pressure in the ear canal opening that might be uncomfortable for some. They fit and stay in place with no problems for casual use and are stable even during fairly vigorous head movement, but hitting one of the stems that hangs out of the ears can knock an earphone loose and cause it to fall out. Some users might find that tapping on the controls to actuate the functions drives the earphone further into the ear canal and that may cause ear discomfort.
