Ultrasonic Deer Deterrent - Eliminate Deer in 48 HoursGET RID OF DEERS IN 48 HOURS We're all tired of animals coming into our homes and ruining the gardens we worked so hard on. This revolutionary Ultrasonic Animal Repellent protects any open area in a garden that receives unwanted visiting animals. Motion activated technology delivered 2. 5s of ultrasonic waves, which are just enough to scare the animal away without hurting it. The unit emits sound waves at a frequency which is only audible to Animals.