AK4490EQ by AKM Design and production,in One Stai Electronic Co, LTD Spot sales,And can pass One Stai Electronic Co, LTD Purchasing。AK4490EQ Price reference $ 0。AK4490EQ - 。You can download Chinese information、Pin map、DatasheetData sheet function specification,In the information AK4490EQ Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial