It has a large dynamic broadband, up to 24KHz-150KHZ, powerful deterrent, constantly changing frequency, so that the mice can not adapt, so as to permanently move out of the residence. Upgraded Technology: The ultrasonic repeller uses the newest ultrasonic and electromagnetic waves to drive away mice, rats, spiders, ants, bugs, cockroaches, mosquitoes, fruit flies, flea, crickets, gnats, insects and rodents, This is a sonic pest repeller control plug-in indoor with built-in LED display . Safe and Quiet Device: Humans and pets can't hear the ultrasonic and electromagnetic waves emitted by the pest repeller. It does not produce any harmful poisons, dangerous chemicals, and traps typically. It is safer than traditional mosquito repellents. MAX 150 Square Meters Effective: The mouse Ultrasonic Pest Repellent is effective for an area up to 150 Square Meters. Since ultrasonic sound can not penetrate the wall and solid objects, especially for areas with serious pests, we suggest installing 2 or more devices for other rooms. They aren't effective for other rooms if you install the device in one room. Easy To Use: Just plug in the pest control repellent into the socket. Please make sure to install it vertically 7-31 inches away from the floor. And make sure there are no barriers like curtains or cabinets covering in front of the repellent. Keep it working continuously. You will see the results within 2-4 weeks! Then we can say goodbye to pests and mice. Features: - Emit three different frequency waves making pests unable to adapt. - This plug in mouse repellent is nontoxic and safe for all humans and pets. - High frequency pest repeller leaves your house clean being safe even for the pests which dont die but just leave your property. - The ultrasonic pest pepeller will protect your home, warehouse, restaurant, hotel, supermarket, or any other property from all kinds of pests. Specifications: Cover range: 150; Frequency: 24KHz-150KHz. Package included: 1 x Ultrasonic Pest Repeller. 1 * User manual.