Quad green circuit board module set: Side-by-side modules with black chips, miniaturized components, and golden pins, designed for scalability and maintenance in compact electronics

FPC Flexible Board (Single-sided/Double-sided) FPC Flexible Printed Circuit Green solder mask with SMT components and antenna interface design, ultra-thin and miniaturized, supporting high-frequency signal transmission and component integration. Ideal for wireless communication modules, Bluetooth earphones, IoT devices, and smart wearables requiring compact antenna connections.