NOISE CANCELLING: Advanced Noise Cancelling and Dual Noise Sensor technology filters exterior sound using two microphones and allows you to enjoy more of your music. LONG BATTERY LIFE: With up to 8.5 hours on your earbuds and up to 21.5 hours in the case, enjoy all-day comfort and up to 30 hours of listening when fully charged. Quick charging, 5 min charge for up to 1 hour of playback. CRYSTAL CLEAR CALL QUALITY: With Precise Voice Pickup Technology, conversations are ultra clear, even in noisy environments. Our noise reduction algorithm uses AI machine learning to suppress ambient noise and extract your voice clearly. DIGITAL SOUND ENHANCEMENT ENGINE (DSEE): Experience a powerful bass and clear vocals with digital Sony Enhancement Engine (DSEE) processing and Sony’s unique 5 mm driver. SOPHISTICATED DESIGN: With a naturally elegant and compact design, bring a touch of beauty to your day and choose between three timeless colors, including Glass Blue, White, and Black. AMBIENT SOUND MODE: With dual mics capture more of the ambient sound around you to enjoy a natural listening experience while staying connected to your environment. SOUND CONNECT APP: Sony | Sound Connect app allows you to adjust the ambient sound in 20 levels or use the Focus on Voice setting to chat without removing your earbuds. Dial in your ideal sound and shortcut settings and keep track of your recent listening history.