Crisp, clear sound via ACAA™?? 3.0 Coaxial Acoustic System 360° immersive spatial audio with music and movie modes CloudComfort™?? ear tips for long-lasting comfort All-new heart rate sensor with soundcore app HearID personalized active noise cancelling 9/28 hours of playtime for all-day listening Note: For peak performance, please use the soundcore app and update to the latest firmware.