Instruct: Classify Amazon reviews into positive or negative sentiment
Query: 10 Lb. Digital Postal Scale

I have not used this scale much so am still not sure how accurate it is. I weighed an item today and took it to the post office and it was 1 oz. heavier at the post office. I have only used the battery so want to test the scale for accuracy when using the cord. Also, when weighing a large item you cannot see the read out.