Instruct: Classify Amazon reviews into positive or negative sentiment
Query: not sure yet

I have been using another devise like the one addressed. I have used it three times according to instructions. And for some reason it is not functioning right. I will give it a shot a couple of times and see what happens. Hopefully there is a one year warranty on it if there is a major problem.I f there is no year warranty then I will have to not buy again from the resaler amazon and not buy from them or you again.Thank you