Key Features

• Emits a safe but annoying ultrasonic noise that they immediately hear, but you can't
• Sound only stops when they stop barking
• Must be strategically placed because it only works if your furry friend barks in front of it
• Built to withstand tough weather conditions
• One unit has a range of 15m
• Requires a 9V alkaline battery (not included) for at least 2 months of battery life depending on how much your dog barks