Bring peace and quiet to your backyard using the PetSafe® Outdoor Bark Control. Cleverly disguised as a birdhouse, the unit can be placed anywhere in your yard or hung from a tree. Whenever your dog (or your neighbor’s dog) barks, he will hear a safe, but annoying ultrasonic sound that’s inaudible to humans. As soon as he stops barking, the ultrasonic sound stops. The unit can only detect your dog’s bark when he is in front of it, so picking the best placement for your unit is key! This weatherproof unit covers 1/4-acre area, but if you need more coverage, simply purchase additional units for your entire backyard area. The battery-operated device uses 1 9-volt battery and lasts up to 2 months depending on how often your dog barks. With a little time and patience, your dog will learn not to bark in the backyard so you can enjoy the outdoors together, peacefully. Your pet deserves the best. Trust PetSafe® to help keep your pet healthy, safe and happy. Key Features Ultrasonic Bark Control - When your dog (or your neighbor’s dog) starts barking, the unit emits a safe, but annoying high-pitched ultrasonic tone; when the barking stops, the tone also stops Discrete Design - Hang the cleverly designed birdhouse in various places around your yard or property line; keep the unit within 5 feet from the ground 1/4-Acre Coverage - Hang the birdhouse in a tree, on a fence post or anywhere in your yard to cover up to a 1/4-acre area; if you need to cover more space simply purchase additional units Weatherproof - Use this bark deterrent in any season and during all weather conditions to stop excessive barking Battery-Powered - Unit uses 1 9-volt alkaline battery (not included); battery lasts up to 2 months depending on how often the dog barks No Bark Promise - All dogs respond differently to ultrasonic tone; if this product does not work for your dog please reach out to PetSafe Customer Care to find the right solution for you and your pet