Instruct: Classify a review into positive or negative sentiment.
Query: Don't waste your money

I bought two of these units, one for each carpeted area where my dogs hang out. A month later and I have yet to catch one flea. Lots of other flying critters,leaves etc but not one flea and my place was infested at that time.I have hanged onto both units and the refills as I will be having a party and these may work well hanging like a lamp on the patio and mebbe I'll trap a mosquito or two. (not kidding)