... passive infrared (PIR) sensor 3.110 degrees Cat chaser for yard use(AN-B010) The frequency ... calibrated to be uncomfortable for the dog,bird,cat,mouse etc, making them run away from you ... range for most humans.Applicability:Ultrasonic Bird / Dog / Cat / Mouse Repeller :Garden,yard,home and apartments,food ... frequency waves will not travel through walls or furniture.Make sure to plug the unit into an ...