The Kerbl 299642 UltraStop Pest Repellent is an effective ultrasonic device designed to protect agricultural buildings, stables, barns, and residential areas from common pests such as mice, rats, and martens. Operating on a 230 V power supply, it emits high-frequency sound waves in the 20-45 kHz range, which are highly irritating to pests but completely harmless to humans and most domestic animals. This device offers an impressive effective coverage area of up to 200 square meters, providing a humane and chemical-free solution for pest control.