Description:Name: Outdoor Ultrasonic Bark ControlMaterial: PlasticWeight: 150gColor: BlackPower Supply: 9V Battery (Not Included)Adjustment Range: 15m Product Packaging: Neutral Color BoxColor Box Size: 11*6.3*6.7cm Features :【Dog Bark Control & Dog Training】The bark control device adopts the latest ultrasonic technology, which is suitable for dogs of all breeds and all sizes. Stop your dog's excessive, noisy barking by emitting an ultrasonic to silence your dog. Anti-barking device with four adjustable ultrasonic volume level-test, low, medium and high, please turn the knob to test different frequency bands for best results.【Safe for Dogs and Human】Ultrasound will not cause interference or harm to humans, because humans cannot hear these frequency bands, but dogs will be sensitive to these ultrasounds. Our dog anti-barking device trusted by the device for training dogs and veterinarians. There is no electric shock, no liquid fuel is used, and the most humane and widely used way to keep your own dog or your neighbors' dog barking.【Effective and Powerful】The new bark controller has a well-designed mini shape. The ultrasonic penetration range is 50 feet, covering the indoor and outdoor area. Designed to be easily hung/mounted on a tree, wall or fence post to stop barking dogs (within reach). Compared with the traditional dog training device, it frees your hands completely. (If placed indoors, please set the sensitivity to 1 or place in a range without noise.)【Durable & Weatherproof】Our anti-barking device is waterproof and durable, can withstand all weather conditions; Making it an excellent outdoor bark control for dogs. It works with 9-volt batteries (not included) and will last up to 1 month depending on the application.【Professional Guidance】The dog repellent device is not applicable in the following situations: aggressive dogs, noisy environments, hearing-impaired dogs, more dogs together, dogs under 6 months or over 8 years. \Packing list: 1 pc. Outer Bark Inspection1pcs User Manual