SRK2001 by STMicroelectronics Design and production,in Chengze Electronics (Beijing) Co., Ltd. Spot sales,And can pass Chengze Electronics (Beijing) Co., Ltd. Purchasing。SRK2001 Price reference $ 3.517064。SRK2001 - 。You can download Chinese information、Pin map、DatasheetData sheet function specification,In the information SRK2001 Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial