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 Cm From The Ground. For Best Results, Equip Each Room With A Pest Repellent. Safe And Eco-Friendly Mosquito Repellent Control: Non-Toxic, No Chemicals, No Radiation, Less Power Consumption, No Noise And 100% Safe For Human And Pets, You Will Say Goodbye To Mouse Traps, Mosquito Traps, Mouse Pads, Pest Poison, And Insect Sprays Etc, No Battery Needed Will Save You A Lot Of Money, Give You A 100 Home % Safe And Eco-Friendly. Super Quiet And Effective Mosquito Repellent: The Ultrasonic Repeller Works With Low Frequency Ultrasonic Waves, So It Can Control Pests Completely Silently And Cannot Disturb You And Your Pets. Pets. Please Note That It Requires A Process. Depending On The Environment, Response Time Varies, Usually 2-6 Weeks, We Are Sincerely Here To Help You Keep The Pests Away. Easy To Use: Just Plug The Repeller Into The Outlet And Leave It Function. The Repellent Instantly Repels Pests Without Killing Them. No Batteries Are Needed, Saving You A Lot Of Replacement.