With your high performance ultrasonic generator youll avoid annoying and ugly cat paw prints on the newly washed car and also youll be protecting yourself very effectively against expensive repairs due to rodent bites the built in special loudspeaker with a coated moisture protected diaphragm emits a 22 khz sound which cant be heard by humans but banishes your animal guests through the power supply with batteries the units location can quickly be changed thus whether in the attic over