Electronic Ultrasonic Pest Repeller,Pest Controller for Pest Reject,Pest Repellent Indoor Plug in,Pest Defender Getting Rid of Spider Mice Mosquito Rats Roaches Cockroaches Rodent Insect(4 Packs)

✦NEWEST CHIPS TECHNOLOGY✦: Which is much better than normal ultrasonic pest repeller. The pest control ultrasonic repeller uses newest ultrasonic and electromagnetic waves to drive away mice, rats, spiders, ants, bugs, cockroaches, mosquitoes, fruit flies, flea, crickets, gnats, insects and rodents. ✦MORE SAFE FOR CHILD AND PETS✦: Throw away the harmful poisons, dangerous chemicals, and traps typically used in households and by insect control technicians. Our mice repellent is 100% safe and effective. Ultrasonic sound is inaudible to humans and household pets; Environmental friendly alternative to harmful and dangerous chemicals, poisons and traps, no bad smell. ✦Wide Effective Coverage✦: The Insect & Rodent Repellent is effective in an indoor area up to 1600 sq. ft. It's widely used in homes, warehouses, offices, gardens, hotels, etc. We recommend you to install one for each room because the ultrasound cannot penetrate walls and solid objects. But for areas with serious pests, we suggest install 2 or more devices for other room. They aren't effective for other rooms if you install device at one room.