REDMI K90扬声器容易进灰？官方回应

Core Points - The K90 Pro Max features dual-layer protection at the rear speaker position, including a metal dust cover and a dust net, and has passed the IP68 dust and water resistance test, effectively preventing dust from entering the device [1] - Users can utilize the built-in speaker cleaning function for regular maintenance or visit service points for professional cleaning with specialized tools [1] - The K90 series supports a Super Moon feature that automatically activates when zooming in on the moon at 20X or more [1]