The Transonic PRO LF emits a variable frequency dual speaker sonic tone that repels mice, rats, bats, chipmunks, squirrels, ticks, spiders, ants and other insects. The higher range of the frequency is high enough to be undetectable to most humans, and is user selectable between 3 kHz and 19 kHz at a volume of 96 dB @ 1.5 feet (most adults can only detect sounds up to 12 kHz). It has a range of 3,500 square feet and has different sound patterns which can be targeted to specific pests at three volume settings of quiet, medium or loud. The Transonic PRO uses no chemicals or traps and provides a safe and humane method of pest control. The unit comes with an AC Adapter and is energy friendly, running on less than 5 Watts. It is ideally suited for indoor applications including attics, basements, garages, sheds, balconies, porches, laundry rooms, kitchens and break rooms.