Comfortable Active Noise Cancellation -Equipped with ANC to isolate ambient noise. No more noise increase in windy environment with the support of anti-wind noise algorithm. The charging case features a 500 mAh large capacity battery, enabling 38 hours battery life in combination with the earbuds.The earbuds achieve single music playback of up to 7 hours. Lasting listening experience with one single charging without worries for low battery. Enhanced Spatial Surround Sound – More impressive sense of space, and more immersive sound quality, offering users the cinema level audio feast.