JBL Deep Bass Sound: 8mm drivers deliver punchy, powerful low-end audio. Smart Ambient Technology: * TalkThru: Lower music volume to talk without removing earbuds. Ambient Aware: Stay conscious of your surroundings while listening. Water & Dust Resistant: IP54 certified earbuds and IPX2 charging case (protected against sweat and light rain). VoiceAware: Allows you to balance how much of your own voice you hear during calls.