Instruct: Classify an Amazon review as either positive or negative.
Query: Substandard product

The cable is skinny and no mark to indicate the wire gauge or any standard body approval. However mark on the male head indicate 250V 6A, which obviously mismatch with the cable capacity. Furthermore, the male metal prongs thickness is so much less than the standard US plugs and cannot stay in the wall socket. It falls off from wall socket very easily.