Instruct: Classify a given review into positive or negative sentiment.
Query: Worked... for a bit

Frequency becomes reset every time device is shut off, and so far it turns off all the time after a few minutes. Waste of money, IMHO, avoid this cheap foreign made item and find a more pricey and reliable one from a well known company or at least from a brick and mortar, so you don't have to mess with mailing anything back.