... 2.long-range passive infrared (PIR) sensor 3.110 degrees Cat chaser for yard use(AN-B010) The frequency emitted by ... is carefully calibrated to be uncomfortable for the dog,bird,cat,mouse etc, making them run away from you. However, it ... the audible range for most humans.Applicability:Ultrasonic Bird / Dog / Cat / Mouse Repeller :Garden,yard,home and apartments,food service ,farms ...