Humane, effective, maintenance-free, the Bird-X Yard Gard Ultrasonic Animal Repeller keeps animals away from your property without messy or expensive chemical solutions. Use Ultrasonic Rodent Repeller to repel stray dogs, feral cats, deer, raccoons, skunks, rabbits, squirrels, opossums, armadillos, rodents, bats, insects and other creatures. With this Ultrasonic Repeller, no chemicals, poison sprays or traps needed. This Ultrasonic Rodent Repeller is made with durable, weatherproof construction and mounts anywhere. The Bird-X Yard Gard Ultrasonic Animal Repeller detects motion with infrared sensor and covers up to 4,000 sq ft. Use in yards, lawns, gardens, buildings and more. AC adapter included with 50' extension cord. Can be operated with 4 C batteries in motion sensor mode. 6-month limited warranty.