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 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.