4-Mic Technology for Crisp, Clear Calls: Equipped with dual microphones for clear, hands-free stereo calls. Includes VoiceAware feature to adjust how much of your own voice you hear during calls. Up to 48 Hours of Battery Life: Provides 12 hours of playtime with noise cancelling off, or 10 hours with noise cancelling on, plus an additional 30 hours from the charging case. Speed Charge feature gives 4 hours of playtime with just 15 minutes of charging. Water and Dust Resistant: IP54 rating ensures resistance to water splashes and dust, making them suitable for various weather conditions and workouts. All-Day Fit & Comfort: Stick-closed Beam design with oval tube shape for a secure, comfortable fit and effective noise isolation. JBL Headphones App: Customize your listening experience, touch controls, environmental noise settings, and Smart Audio & Video modes through the app.