Key Features: <br />The repelling ultrasonic frequency :22 - 65KHz <br />effective range : 80 - 120sqm <br />ppower source : AC 90V - 250V ，50 - 60Hz，<br />power:5 - 6W<br />It is applicable to repel cockroach， mosquito， insect， pest etc，No-toxic and environment，friendly，Safe and odorless ，with ABS shell， durable and shock resistant <br /><br />Cockroaches， mosquitoes or something like that are disgusting， insanitary， especially for children. Because mosquitoes transmit malaria， rats may carry the virus and cockroaches spread bacteria.....They are dangerous sometimes! For the sake of your and your family's health， you need this Ultrasonic Electronic Pest Repeller， and create a clean and healthy living environment for them. The greatest love always lies in the details.