usb pwr sw w/ boost converter

1, super large EMS factory supply, the best storage conditions; 2, the original factory has not opened the original standard (the whole package), the quality is guaranteed; 3, non-special control materials can not be painted; 4, the latest year products, available for a variety of scarce materials;

1, super large EMS factory supply, the best storage conditions; 2, the original factory has not opened the original standard (the whole package), the quality is guaranteed; 3, non-special control materials can not be painted; 4, the latest year products, available for a variety of scarce materials;