This new humane ultrasonic training device really works. A built-in microphone senses barking and triggers a choice of audible tones, or an ultrasonic tone that is inaudible to humans but not to dogs. Once the barking ceases, the tone stops automatically.The tone selector allows you to adjust the sensor to increase effectiveness and minimise false triggers.
Plugs into the mains and comes complete with 30ft. mains cable, weather resistant cover and wall bracket.