12V 16 Channel Relay Module with Light Coupling Power Supply

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• Paste the label on a flat surface on the package
• Make sure that both 1D and 2D barcodes are clearly visible
• Ensure that the label is smooth and isn’t creased or wrinkled
• Check for any tears, dents, holes or scratches
• Pack your product tightly, with the right size packaging
• Ensure both barcodes are on a flat surface of the package