Smarlance Ultrasonic Outdoor Bark Controller No Harm to Dogs Or Other Pets, Plant, Human,Easy Hanging Bird House Designed with Anti Barking Device Ultrasonic Training Dog Stop Barking;

Why choose this Proven Dog Barking controller?
The ultrasonic frequency is not harmful to pets and completely inaudible to human ears.
You can hang this dog barking control black birdhouse on a tree, without ruining your decoration.
This anti barking control device has the internal microphone to pick up barking sounds within a 50-feet range and activate the unit.
Weatherproof & durable, it’s the best outdoor bark silencer for anti bark control you could have!
How it works:
Insert a standard 9-volt battery into the unit. The unit is automatically activated by the sound of barking. When the device is within the range of a barking dog, the microphone will isolate and pick up the barking dog to emit an ultrasonic sound to silence the dog.
Material: PP
weight: 440g
Power: 1 x 9V battery (not included)
Distance: activated at 15, 30 or 50 feet
Product size (L x W x H): 11.5 x 10.5 x 17cm