PCBA, Membrane Switch, FPC manufacturer / supplier in China, offering Smart Electronic PCB Board 3X7cm DIY Universal Printed Circuit Board 3*7cm Double Side Prototyping PCB for Copper Plate, Smart Electronics Copper Clad PCB Double Side Boards Kit for Dly Soldering with 5 Sizes Compatible with Ardu Kits, Smart Electronics Fr-4 PCB Board Double Sided Copper Plate Kit for DIY Soldering with 5 Sizes Compatible with Ardu Kits and so on.