Newcomdigi Electronic Ultrasonic Pest Repeller,Mosquitoes Pest Control It emits a powerful high -requency electromagnetic wave which repels pests.It can also emit waves through your in-wall wiring to prevent pests from entering through walls. It will also disturb existing pests by making an unideal living environment for them. Protect your home from unwanted insects and critters without using poisons, traps, or chemicals that can harm you or your pets. can repel rice,mice, roaches, spiders, ants and many more other pests. East to use,Simply plug the Ultrasonic Pest Repeller into a wall outlet and as long as the LED light is lit, pests will avoid your home Features:Nno-toxic,environment-triendly sare and dorless,22-65KHZ of repelling,80-120sqm.of protection,Frequency ranges:22-65KHZ,Power source: AC90V-250V 50-60Hz Package Included:1 x Ultrasonic Pest Repeller