Electronic Pest-A-Cator Plus 2000, Electro Magnetic & Ultrasonic Technology, Direct Plug In Feature Is Easy To Use, Just Plug The Device Into Any 110V Outlet, Safe Around Children & Household Pets Except Rodent Type Pets, Completely Maintenance Free, Not A Chemical That Washes Away, Not A Trap That Requires Emptying Dead Or Dying Animals, Works Up To 2,000 SQFT.