The product design is like an alarm clock, luxurious outdoor ultrasonic bark can be hung on the tree, anywhere in the house or in your yard, it can be hung at random on the table or elsewhere. When detecting excessive barking luxury outdoor ultrasonic bark Alarm clock, microphone sensing barking and active components. Then the product will emit a high-pitched ultrasonic sound security dogs can hear, but people can not hear. Dogs are stimulated sound will stop barking. Because ultrasound will make the dog feel uncomfortable, the dog will stop barking. Designed for outdoor use, outdoor ultrasonic bark is durable and waterproof. There are 3 levels sensitivity (effective range in the 4.5,9 to 15.24 meters), as well as a test file. It requires a 9-volt battery (not included), average battery life of 2 months. Outdoor ultrasonic bark has power indicator, when you leave can be set to "Off" to protect the battery. Life cycle is limited, one-year warranty period. Excessive barking dog for you and your neighbors will be affected. Outdoor ultrasonic bark can effectively prevent barking and no receiving collar. Safe and effective for all breeds and sizes of dogs. Features: * Use of ultrasound to deter barking * Effective range of 50 feet * 4 levels of operation * durable and waterproof * Two-color indicator display power is sufficient * 9 v battery - (battery not included) * can prevent Your barking * can prevent your neighbor's barking dog * can prevent a specific time training the dog barking * * prevent chaos barking dog barking at the sound-sensitive camping * Microphone: Trigger ultrasonic sound. * Switch with four levels of operation: * OFF-- for conserving battery * Test-- used to verify the microphone and speaker function * Low Sensitivity-- short distance monitoring (15 feet) * Medium Sensitivity - (up to 30 feet ) * High Sensitivity-- high sensitivity (50 feet)