Sound core | hear it. Feel it. a Brand Under Anker innovations advanced audio The graphene-coated drivers eliminate distortion to produce sound with enhanced accuracy and outstanding clarity. Enjoy detailed highs, bright midst, and satisfyingly deep bass. enhanced voice pick-up two built-in microphones with uplink noise cancellation filter out external noise to boost clarity and quality. Your voice sounds ultra-clear even when you're walking down a crowded city street or on a packed train to work. 5-hour playtime Anker charging technology delivers an industry-leading 5-hour playtime from a single charge. For a boost of power on-the-go, use the included charging case for up to 15 extra hours of use. touch control Built into Liberty air's earbuds are discreet touch pads to allow you to play, pause, and skip music and answer calls with simple touch commands. secure-fit Liberty air's in-ear design and multiple sizes of ear tips allow you to customize the fit of the earbuds. Crank up the comfort level and enjoy music and stereo calls with superior noise-isolation. one-step pairing after the initial set up, Simply take Liberty air out of the charging case and they'll instantly connect to your device.