Do you often get annoyed because of mosquitoes, mice, Cockroaches, or something like what can be seen almost everywhere? They are disgusting, unsanitary, especially for children. And they are dangerous sometimes! Now, you don’t worry anymore! For the sake of you and your family's health, you do need this ultrasonic pest repeller, creating a clean and comfortable living environment for your family. The greatest love always lies in the details！   Note & Warning: √Please ensure that there are no obstructions around the device when it work. The installing point should be far away from carpet, curtain etc. √Maybe you cannot get instant results in a short time. Once you keep using our product for a while and make sure continuous use for at least 4 weeks, you will find its powerful effect! √The pest ultrasonic reject drives pest away through the ultrasonic frequency. It is completely quiet and safe without radiation, harmless, odorless to humans and pets. √This device should be installed at 7-31 inches away from the floor and vertical to the floor. Additional units will be required in larger areas like attics, basements, garages and large storage.   Product Specifications: Material: ABS Safety Devices: Built-in fireproof tank Input Frequency : 25-65kHz Input Voltage: 90V~250V Power: 4-6W Operating Temperature: -15℃-60℃ Operating Humidity: ≤85%RH Package Including: 4 packs