Underground Exterminator, Kills Rodents Painlessly With Carbon Monoxide, Easily Connects Car, Truck Or Tractor Exhaust Pipe to Garden Hose, Pressurized Fumes Fill Underground Burrows & Are Effective Within 15 - 30 Minutes Of Engine Running Time, Effective Up to 275', No Poisons To Harm Children, Pets Or Environment, No Handling Of Traps, Or Removal Of Dead Rodents Necessary, Safe For Lawns, Gardens, Golf Courses, Farms & Range Lands.