Durable &Weatherproof - Ultrasonic anti-smashing, durable, weatherproof, sturdy bark box bark control, lightweight, waterproof material, can withstand any weather conditions.Excellent outdoor barking control! 100% Safe Anti Bark Device - Ultrasonic frequency is harmless to pets and has no effect on human ears. Humane sonic bark deterrents and professiol way to train your dog to stop barking with this house device for barking dogs. 50-inch Effective Range - Outdoor Bark Control is automatically activated when it detects barks up to 50 feet away. Can be hung on a tree, indoor, outdoor wall or fence post to stop dogs barking. Unique Birdhouse Design - The designer chose ABS plastic from a variety of materials, which is very shattering resistant. The interior is also installed with fixed devices, and lightweight, super cute design, suitable for outdoor decoration. Adjustable Ultrasonic Level Control - Suitable for small medium large dogs! Emits harmless and effective sound to control excessive barking, but some dogs may be afraid or dislike the sonic sound, not stop barking at the beginning, so please allow up to 2 weeks for training.