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Ultrasonic Pest Repeller Ultrasonic Pest Repelleris effective in controlling mice,rates, roaches,fleas, flies, crickets, sliverfish, waterbugs,moths, ants,and most other Common pests. Laboratory research has shown ultrasonic sound waves attack the auditory and nervous systems of most common pests causing them pain and discomfort.. 160 decibels of sound pressure.pest will give up their source of food,water and shelter and move on.These high-intensity sound waves are out of the range of hearing of humans and most household pets such as dogs,cats.fish and birds,and farm animals. Ultrasonic Pest Repellerwill not interfere with telecisions, radios, electronic burglar alarms,fire or smoke detectors, pacemakers, hearing aids or other electronic equipment. Ultrasonic Pest Repellerdoes not harm plants,either. CHARACTER: It effectively protects an area measuring 2,000 to 2,500 square feet. After plugging Ultrasonic Pest Repeller in,you will notice a small red L.E.D.indicatesUltrasonic Pest Repeller is operating properly,Ultrasonic Pest Repeller ”S” unique test button on the back panel,when depressed,causes the unit to shift its output down into the audible range of humans for a reassuring cheek of its ultrasonic output. The shrill,siren-like sound produced simulates the sound pests hear continually. Ultrasonic Pest Repeller automatically sweeps the ultrasonic range of 20,000Hz to 60,000Hz, the adjustment knob allows the rate of this sweep to be varied to prevent pests from developing an immunity to a preselected single sweep rate. USAGE: When you first installUltrasonic Pest Repeller turn the knob fully to the left or to the right. Each month or so, twist the knob just a bit in the opposite direction. Depressing the test button before and after the adjustment lets you hear the slight difference in sweep rate. You will begin to notice the effects ofUltrasonic Pest Repeller in a few days. There will be an absence of rodent activity. Perhaps you will notice and increase in insect activity during this time due to the ultrasonic sound waves driving these pests from hiding. In a short while they’ll be gone also. While the pests are being driven away, they are undoubtedly leaving their eggs and leaves behind which are not affected by the ultrasonic sound waves. Incubation will continune and they’ll hatch usuall. At this point, howeverUltrasonic Pest Repeller output will begin to attack these hatchling’s auditory and nervous systems, driving this new generation away. In 4 to 6 weeks the infestation should be over and you’ll be free of pests. LeaveUltrasonic Pest Repeller plugged in for year round, day and night pest control. It costs only about 1 1/2 a day to operate. No more dangerous chemicals to buy, no more messy traps to clean. NOTICE: Do not placeUltrasonic Pest Repeller on carpeted surface, behind furniture draperies or other soft objects as the will absorb the sound waves. Do not placeUltrasonic Pest Repeller nest to your ear before performing this check. Do not use outdoors or let the unit come in contact with water.