Instruct: Classify a review as either positive or negative.
Query: Complete waste of money and time!

I have never been able to hear a baby's heartbeat with this device, in fact, I don't think I heard anything, on slight occasion, I heard my own heartbeat when held to my chest - just to make sure it even worked, I work in OB, so you think I would be able to find a baby heartbeat, I found dissapointment instead.Not useful, Not even amusing or entertaining.