Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Junk

Just to reiterate, this product is junk. we live in a quiet area so no car sounds, and we turn off the television. I am 28 weeks and nothing. I thought maybe I heard a faint sound, but it's nothing like my doctor's doplar sono that she uses to listen to the heartbeat and is pretty much worthless. The only thing I can hear is the sound of my own body. I strongly advise against purchasing this product.