Intelligent Technology: This Ultrasonic Mouse Repeller Emits Different Frequencies Of Ultrasonic Waves (25Khz-65Khz) To Irritate The Nervous System Of Insects And Rats, Making Them Feel Uncomfortable And Gradually Flee. Intermittent Changes In Ultrasonic Frequency Prevent Them From Developing Immunity And Adaptability. Large Coverage: Each Ultrasonic Repeller Can Cover Up To 120 Square Meters. It Is Recommended To Install This Hammer Vertically At A Distance Of 20 To 80 From The Ground. For Best Results, Equip Each Room With A Pest Repellent. Safe For Children: It Can Drive Away Harmful Insects, Mice, Cockroaches, Ants And Spiders, Rodents, Etc. The Ear Cannot Detect Sounds, So It Does Not Interfere Or Irritate People. You Don'T Have To Kill Mosquitoes With Chemicals.Lightweight Design: Ultrasonic Mouse And Rat Is Portable And Easy To Set Up, Just Plug And Play. Energy Saving, Protect You From Pest Intrusion All Day. Widely Used At Home, Warehouse, Office, Hotel, Etc. After-Sales Service: Ultrasonic Pest Repeller Will Achieve Desired Results After 3-4 Weeks Depending On The Severity Of The Pest Infestation. If You Don'T See The Result After Connecting It Within 4 Weeks Or For Any Other Reason, We Always Offer The Best Product For Our Customers. If You Are Not Satisfied With The Quality Of Our Insect Repellent.