ultrasonic rat repeller

Super Vibrate Garden Mole RepellerMaterial: durable plastic and corrosion-proof aluminium. Working range: 625 square meter.Battery type:4*D(R20)Frequency:400Hz-1000HzDuty cycle:30 Seconds 1.Repels by emitting an intermittent combination of sound and vibration. The sound waves will irritate them, simulate danger, and repel them away from the irradiated area.2. Applicable to outdoor gardens, nurseries, lawn and other surface and underground flooding rat.3.Battery slot included,you can easily change the batterier without pull out the whole product.4.Emitting the sound wave each 30 seconds and lasted for 3 seconds.5.Weatherproof, and anti-ultraviolet,the use of 1-2 years would not change.