MR50 keeps away mice and rats indoors – effective, hygienic and non-toxic. Silverline® A-Guard® is unique sound technology that effectively scares away pests. Plug the unit into a wall socket in the area you want to protect – it starts working immediately and round the clock! MR50 covers up to 50 m². MR50 emits the unique A-Guard® ultrasonic signal, a varied and well-adapted signal that repels mice and rats. A-Guard® disrupts the natural behaviour and communication of mice and rats and creates an unbearable environment for them, making them avoid the area. The MR50 unit covers an open area of up to 50 m². The sound does not affect humans or pets (except rodents) and does not create resistance among the targeted pests. Does not interfere with other electronic equipment. A Silverline® Pest Protect system® product.