By advanced radar technology, Watch Dog detect the intruders through the thick doors, walls and glass.  The convenient size could be perfect for any hidden place in private or public building.  Plug it into a standard outlet, what you need to do is only turn it on, then it start its job. 

  When an unexpected intruder approaches the target area, the Watch Dog immediately emits the sounds of a ferocious shepard.  The sounds works to deter the intruder, meantime, alerting the house owner to the possible danger and get the time to arm oneself or to call the police.  And it is even useful to ward off and alert against the bear intrusions without a human contact.

  The Watch Dog emit different sounds for warning depend on one’s option that choose from four settings. On detecting the movement, besides the barking dog mode, there is also a soothing sounds mode of the rainforest to alert you of a visitor’s arrival. And also the police siren which after a couple of barking dog sounds that can be aggressively  scare away the intruder.  The other one mode when you don't need alert for anyone's arrival, Watch Dog can play continual soothing sounds of rainforest melody such as flowing water, birds singing, frog croaking…etc.  With this sounds of the nature, you will feel peace and relaxed just like in the rainforest.

Turn it on and the Watch Dog will never sleep.  No need feeding, bathing or even walking to maintain a living dog's life.  Detect area distance and volume control adjustable. No installation required. It’s a perfect neat home safety device - door opening prevention device.