Ultrasonic Dog Repeller – High-Power, Flash Mode, Effective Outdoor Use for Controlling Aggressive DogsOverview This ultrasonic dog repeller is an effective tool for controlling aggressive or unwanted dog behavior, both indoors and outdoors. With a high power ultrasonic sensor, it emits a strong sound that is harmless to dogs but effective in deterring them. The device features a flash mode for enhanced visibility, making it ideal for use in various environments. Key Features Powerful ultrasonic technology to deter dogs from unwanted behavior Flash