Provides up to 13 500 sq ft of coverage. Gets rid of moles voles gophers shrews & other burrowing rodents. Patented motor drive generates powerful vibrations that though harmless to pets & humans are irritating to rodents. Intermittent emissions minimize the chance that rodents will become immune to the effect. Anodized with a rich gold tone & crafted from a single billet of aluminum to ensure lifetime performance. Watertight cap allows easy insertion at ground level protecting lawnmower & making it virtually invisible. Patented battery cylinder allows user to change batteries without removing the unit from the ground