The Big Cheese Ultra Power Mega-Sonic Twin-Speaker Ultrasonic Pest Repeller

Advanced rodent repellent emits ultrasonic sound to drive away rodents without being audible to humans, dogs, or cats.
Whole room protection: Twin-speaker functionality allows for wide-angle, extended coverage and protection

For indoor use only: Each unit, without obstruction, protects a full room, or an area of up to 60sq m. 1.8m cable is supplied to enable easy positioning of the unit from power socket Guaranteed satisfaction: Rodent repellent is supplied with a two-year warranty and money-back guarantee if you’re not fully satisfied Economical rodent control: Operating the ultrasonic unit costs less than a penny a day in electricity costs