Useful Anti-Barking Device Our dog barking control devices provide dog barking control and stop behaviors such as digging, chewing furniture, fighting, eating unsafe food and other bad behaviors. LED Flashlight with Multi Settings More than just a dog barking control device, it's also a super bright flashlight that can be used as a secondary method of deterring approaching dogs. flashlight can also be turned on and used to light the way home. Safe for Dogs & Human The frequency of dog barking control devices is 20-23khz, it is easy to attract the attention of dogs, but it is not harmful to dogs and people. These dog barking control devices prevent dogs from barking in the most friendly and widely available way. However, some dogs may be afraid or dislike the sound and won't stop barking at first, so allow up to 2 weeks for training. Awesome Dual Ultrasonic Speakers Its portable design makes the dog barking control devices suitable for indoor or outdoor use. A high-frequency flashlight combined with ultrasonic waves increases deterrence, especially at night or in low-light environments. Easy to Carry The small size of the dog barking control device fits perfectly in your hand, it can be held comfortably in your hand or in your pocket, which is convenient for you to carry around. This allows you to train your dog in wider areas like parks, grass, beaches, etc., while also keeping unfriendly dogs outside from approaching you