Intellipet X40 Ultrasonic Dog Bark Solver Ultrasonic bark reduction outdoor unit Frequency adjustment allows for selection of either ultrasonic sound or a sound audible to both dogs and humans Ideal for partially deaf dogs or dogs up to 40-feet away and outdoor use only Comes with one year warranty Measures 8-1/4-inch length by 4-7/8-inch height by 5-inch width without cone and 9-5/8 width with cone