SK-220RD by 4D Systems Design and production,in Hong Kong One Core Century Technology Co., Limited Spot sales,And can pass Hong Kong One Core Century Technology Co., Limited Purchasing。SK-220RD Price reference $ 119.829600。SK-220RD - 。You can download Chinese information、Pin map、DatasheetData sheet function specification,In the information SK-220RD Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial