Adopting a variable ultrasonic frequency wave, this ultrasonic pest repeller emits a sound wave and effectively ward off most pests and mice within 3-4 weeks. Cover up to 1200Sq. Ultrasonic Repellent Technology: Adopting an upgraded 22-65KHz variable ultrasonic frequency wave,this ultrasonic pest repeller emits a sound wave that simulates the frequency range of a predator's call,effectively warding off nearly all pests and mice within 3-4 weeks.
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