Eastoan [2018 Upgraded Ultrasonic Pest Control Repeller Plug in-Electronic M, Blue HI-TECH & EFFICIENT: Adopting upgraded chips, our ultrasonic pest repeller destroys the nervous system of pests and rodents to make them feel uncomfortable and flee away gradually. With intermittent changes of mice repellent ultrasound frequency, pests and mice cannot develop immunity and adaptability. NON-TOXIC & ECO-FRIENDLY :The ultrasonic waves of pest repellent are only audible to pests and rodents. Naturally drives pests out without killing them.No need to clean up dead insects and pests. Forget the harmful chemicals, poisons, and mouse traps typically used in households and by insect control technicians. LIGHTWEIGHT & EASY TO USE: The pest repeller is easy to carry and install, just plug in and play. Widely used in home, warehouse, office, garden, hotel, etc. Energy saving, just plug this pest control into the socket to protect your house from ant intrusion all the day. LARGE COVERAGE AREA :Our pest reject is effective for an area up to 1200 Square Feet. Please note that ultrasonic waves cant travel through walls. Though our unit works very well, but we recommend placing our Sonic repellent in every room ! LIFETIME GUARANTEE ASSURANCE:We have great confidence in the quality of this upgraded pest control repellent. We provide 100% SATISFACTION after-sales service within 24 hours. If you are not satisfied with the pest repeller, please don't hesitate to email us to get a solution.