The HUAWEI FreeBuds 4i earbuds achieve crystal clear audio delivery. Featuring a 10 mm-diameter dynamic driver unit, two microphones for environmental noise cancellation during calls, feedforward active noise cancellation and awareness mode. With a low power solution and 55 mAh battery, the HUAWEI FreeBuds 4i earbuds have a long battery life and a fast charging speed via the charging case. Enjoy 10 hours of playback on a single charge, or get 4 hours of playback with just 10 minutes of charging. Experience comfortable noise cancellation in most day-to-day environments and awareness mode with a simple pinch-and-hold.