Gets rid of moles, voles, gophers, shrews & other burrowing rodents; Made of sturdy, high-impact materials; Weatherproof & proven effective; Penetrating sonic pulses of 300Hz at 15-sec intervals irritate burrowing rodents & motivate them to move to a more comfortable home; Unit can be buried flush with lawn, allowing easy mowing without detracting from the landscape; Patented battery cylinder allows user to change batteries while unit remains in ground; 4-month-6-month battery life; Lifetime warranty;