Legal basis for this claim?

Where I live, in NZ, this kind of statement is considered a consumer guarantee and you are required to provide your good/service as per the description but is this binding in American law?? No doubt he will somehow not deliver but surely there's a law in the US enforcing this.

Where I live, in NZ, this kind of statement is considered a consumer guarantee and you are required to provide your good/service as per the description but is this binding in American law?? No doubt he will somehow not deliver but surely there's a law in the US enforcing this.