Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not worth the money

This mini calculator/keypad may be OK for occasional use, but if you are looking for something to use everyday, stay away from this one. The thing goes to sleep constantly - to save battery power of your laptop I suppose - but this feature is very annoying if you use a 10-key a lot. The device also constantly freezes up - I find I have to stick the end of a paper clip into the 'reset' hole on the back of the device several times a week. The keys are also stiff - you have to hit them hard, which makes it easy to miss numbers if you are typing quickly. I am ready to throw mine away and try something else.