The STV820 Big Cheese Battery Powered Mouse Repeller is a professional-grade ultrasonic device engineered for industrial-strength rodent deterrence in areas without mains power. This high-production unit emits powerful ultrasonic sound waves across a coverage area of up to 10 square meters to disrupt the auditory and nervous systems of mice. The compact, battery-operated design is ideal for remote locations such as sheds, lofts, outbuildings, and caravans. It provides a humane, chemical-free protective barrier that remains active 24 hours a day, ensuring long-lasting pest control without interfering with humans or non-rodent pets.