CLEANRTH QuadCore Electronic Pest Repeller | Over Four Dominating Pest Repelling Techniques Repels using four functions: (1) Variable Ultrasonic Sounds (2) Odor Remover known to reduce mosquitoes (3) Unmatched Electromagnetic Inner Wall Repelling Technique (4) Negative Ion Producer known to repel pests and kill airborne viruses Coverage = 5,000 Square Feet of Ultrasonic Repelling Power in an unobstructed area. All functions have an ON/OFF Switch. We've had positive Quadcore Electronic Pest Repeller testimonials in repelling: Mice, Rats and many types of insects. Covered by a One-Year Money Back Guarantee & a One-Year Warranty "We Care About Your Results"