This is the device that calms anxious cats via ultrasonic sound frequencies that are inaudible to human ears. Ideal for felines that struggle with stress from fireworks, thunderstorms, or separation anxiety, it broadcasts six different frequencies that only pets can hear, keeping them calm in stressful situations. It has a 15' range and its portable design makes it ideal for trips to the vet or long car rides. The device can also be set to play (human audible) wave sounds and music. Charges via USB. 6 3/4" H x 3 1/2" W x 4" D. (1 1/4 lbs.)