Humutan Anti Barking Device, Outdoor Anti Bark Deterrents with Adjustable Ultrasonic Level, Waterproof Ultrasonic Infrared Dog Barking Control for Small Medium Large DogsDurable and Weatherproof: Built with the highest level of quality to ensure long term use; it is waterproof and durable so it can withstand any weather conditions; making it an excellent outdoor bark control for dogs. Light Weight: This version is light weight and was designed super cute and adorable for outdoor decor; although it may be used indoors as well it isn't recommended. Adjustable Ultrasonic Level Control: Safe for small medium large dogs.