Outdoor Ultrasonic DOG Anti-Bark Device Outdoor Stoping Barking PET Training Repellents How The Sonic Dog Bark Control Works When the Sonic Dog Bark Deterrent is within range of a barking dog,an internal microphone pick up the sound and the unit is automatically activated. The Sonic Dog Bark Deterrent emits an sonic sound. the sound can be heard by dogs but does not affect humans Startled by the high-pitched sound that is safe and effective,the dog should stop barking, which is harmless for both your dogs and your family. it will help human to keep away from unwanted barking. When the dog stops barking the sonic sound also stops. The sonic Dog Bark Deterrent has 3 range levels and a test mode.It is effective up to 50 feet. Suitable for All Breeds of Dogs This barking control device will be suitable for all types of dogs,Which with normal hearing over 6 months and under 8 years old.The device will release sounds that cannot be heard by humans but can be heard by dogs to simulate the sound. Mini shape This new bark control device comes with a cute well-designed mini shape , There is a hanging hole on the back of the product. Long Battery Endurance Working for 30 days by fully charged for 5 hours . When the product is turned on, it will flash once every six seconds when in any gear. The light is not always on Barking Device 3 adjustable volume levels , and 25 ft control, cute mini design & high quality , safe & effective?portable & long working , perfect for dog barking control and dog training. Stop Bad Behaviors Dogs often have bad behaviors, such as barking loudly and chewing furniture. But our sonic Bark Control Device can help you train your dog to stop this bad behavior. And provide you with a quiet and comfortable environment Easy to use for Indoor and Outdoor Easy to use for Indoor and Outdoor Waterproof designed for easy hanging/mounting on a tree, wall or fence post to stop dogs barking