Super Ultrasonic Mouse Repeller 1) It effectively protects an area measuring approximately 200 square meters. 2) Frequency Conversion Ultrasonic Mouse Repeller is effective in controlling mice,rates, roaches,fleas, flies, crickets, silverfish, waterbugs,moths, ants,and most other Common pests. 3) Laboratory research has shown ultrasonic sound waves attack the auditory and nervous systems of most common pests causing them pain and discomfort. 4) Frequency Conversion Ultrasonic Mouse Repeller automatically sweeps the ultrasonic range of 24,000Hz to 45,000Hz, 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. 5) Weight: 1 pound 6) Power supply: AC ADAPTOR DC 9V 200mA AC 100-120V 5060 Hz or AC 220-240V 50Hz(available separately depending on country) 7) Power consumption: 3 watts 8) Frequency range: 24,000Hz to 45,000Hz 9) Output sound pressure: 160dB 10) Size: 14.4 x 5 x 8.6