【Item Features】\r\n 1. The mini ultrasonic bark device suitable for indoor use and walking the dog outdoors as well.\r\n 2. Working Principle: After charging, press the button of ultrasonic emission in an effective range to send out the ultrasonic wave to correct the dog\'s behavior.\r\n 3. This product produces a high-pitched ultrasonic sound that is irksome to dogs and at the same time it is soundless to the human. It is fully harmless and safe to humans and dogs.\r\n 4. Compact design, small and lightweight. One button to operate, easy and convenient to use. The Dog Bark Deterrent is portable enough to fit your hand and pocket, and suitable for indoor or outdoor activities.\r\n 5. It can not only prevent dogs from barking but also instruct their uncivilized behavior. You can correct unwanted behavior such as jumping up, digging, chasing, trash raiding and excessive barking. This can change your pet\'s bad habit of barking under the principle of ultrasonic sound.\r\n 6. Suggestions for Use: when using this product to train dogs, the effect with verbal instruction of the owner will be better.\r\n\r\nPackage includes: 1 x Ultrasonic Dog Bark Deterrent 1 x Wrist strap 1 x User manual