Anti-Bark Device Dog Bark Control Sonic Dog Bark Plug, Adjustable to Stop Dog Barking, Bark Control Waterproof Sonic Bark Deterrent for Indoor and Outdoor Use Effective for most dogsThis device is suitable for all breeds and sizes, but not for deaf or hearing impaired dogs. Some dogs may be afraid or dislike of ultrasound and will bark incessantly at first. Please allow up to 2 weeks of training time. HIGH FUNCTIONAL EFFECTIVEThe effective range of the anti-bark device is up to 50 feet. And there are 3 range grades, 15KHZ-30KHZ for large naughty dogs. 20KHZ is suitable for docile dogs. 30KHZ is suitable for small dogs Improve Anti-Barking Training Efficiency- The sonic anti-barking device combines dog behavior training and barking control. It can effectively train your dog to stop unwanted bark. Training is required for efficient and long-lasting use. Waterproof and Super Cute Mini DesignIPX7 waterproof dog bark unit, smash-proof, durable, weatherproof, sturdy, can be used indoors and outdoors in any weather conditions. Equipped with a well-designed mini birdhouse shape, it is light and easy to install, easy to place or hang anywhere. Warm TipsOur barking equipment may not be suitable for all dogs. Deaf dogs will not respond to this device. Hearing-impaired dogs probably aren't either. Each dog's behavior and tolerance are unique, and each dog responds differently to different degrees and corrections. Bark guards are the most user-friendly and effective way to stop unwanted barking, and are more user-friendly and safer than dog collars. feature: - Use sound to suppress unwanted barking - Detect barks up to 50 feet - Durable and waterproof, suitable for outdoor use - Bi-color indicator shows whether the battery is full - Powered by 9V battery (battery not included) model: T --- used to verify that the microphone is working Off --- for saving battery life 1 --- Low range: up to 15 feet 2 --- medium range: up to 30 feet 3 --- High range: up to 50 feet How to test it: 1. Turn the mode switch to "T". 2. Keep the device an arm's length from the mouth. 3. To activate the unit, say "Woof" aloud into the microphone. 4. The LED light will flash red and beep to indicate that it is working properly. pack Anti-bark device x1 User Manual x1 (battery not included) notes This product is not intended for use in deaf or hearing impaired dogs. In some cases, dogs can become desensitized. To avoid this, turn on the outdoor bark control only during times of unwanted barking. The device uses low-intensity ultrasound, which is silent and harmless to the human body. Safe for small, medium and large dogs. Not every dog learns at the same rate. Please allow up to 2 weeks.