About this item: 1.Function & Advantages: use ultrasound to prevent a dog's barking;effective range of 50 feet;durable and waterproof;can effectively prevent your dog and your neighbor's dogs from barking and can prevent a dog from calling at a certain time and a dog from barking at camping.It can train puppies is not barking 2.Description: the product looks like an alarm clock, the luxury outdoor ultrasonic barking device can be hung on a tree, anywhere in the house or in your yard, it can be hung, on the table or anywhere else. When the luxury outdoor ultrasonic barking alarm clock detects excessive barking, the microphone will respond to barking and activation parts. At this time, the product will send out a safe high pitch ultrasonic sound, and the dog can hear it, but no one can hear it.The dog is stimulated by the sound and will stop barking. Because ultrasound can make dogs feel sick, dogs will stop barking. 3.4 level operation: OFF - for saving batteries,Test - to verify the functions of the microphone and the speaker,Low Sensitivity - short range monitoring (15 feet),Medium Sensitivity - (up to 30 feet),High Sensitivity - (50 feet) 4.Design: there are 3 files of sensitivity (effective range from 4.5,9 to 15.24 m), and a test file. And the battery life expectancy is 2 months(the two color indicator shows sufficient electricity). The outdoor ultrasonic barking device has a power indicator. When you leave, it can be set to "Off" to protect the battery.Designed for outdoor use, outdoor ultrasonic barking device Note: it needs 9 V batteries - (batteries are not included), a sound sensitive microphone: triggering ultrasonic sound. Package Include: 1 x training dog device 4 x dog training clicker when the microphone of the dog barking deterrent device detects a barking dog, the product will automatically emit an ultrasonic wave, which is inaudible to the human ear but can be heard by the dog; In this way, it is a harsh noise to the dog, so the dog will stop barking and leave designed for outdoor use, the barking control device is designed to look like an alarm clock and can be easily installed on a tree, wall or fence post to stop any dog from barking within range, indoors and outdoors The durable, plastic and extremely portable Dog Training Clicker functions perfectly as a useful sound training tool. Train your dog to fetch, roll over, shake, quiet down and more with the easy and efficient Dog Clicker. Consistency is crucial in training your dog and having numerous clickers in different areas helps you be prepared and increases the success of the sound training.