Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Poor human interface, not reliable

With a fresh set of batteries and plugged into a wall as well, this Super Bark Free Pro would not create a signal, sonic or ultrasonic. I would not buy from this company again, they would not respond to my bark either. Because some of my neighbors in the marina have well manored dogs, it was only one young selfabsorbed couple on their converted troller/yacht with the problem animal. I didn't want to effect other animals so I waited months for people to learn from each other, but ultimately decided to initiate this Lenteck product to ZERO effect. I walked to the end of my dock with a dog barking in the air, and disposed of it with a heavy heart as I knew it was a waste of time, patience, and electronic waste. The modes also do not indicate clear function, the interface is poor and this thing is huge and obvious. This was not a review of the retailer.