Description soundcore-Engineered FlexiCurve™ Structure: Reduces Space One Pro’s size by 50% with its super foldable design. Exclusive 4-Stage Noise Cancelling System: Cancels out on-the-go noise in real time. Drivers with Triple Composite Diaphragms: Enjoy Hi-Res distortionless audio. Long-Lasting Listening: Listen up to 40 hours with ANC and 60 hours without.(Depends on volume and usage) Experience ultra-fast charging—just 5 minutes of recharge offers 8 hours of music. All-Day Comfort: Listen for longer with the pressure-relieving headband and soft earcups.