Product Specifications Rated Power: 5W Power Voltage: AC 90～220V Inaudible Ultrasonic Frequency: 25-65KHz Effective Coverage Area: 800- 1200 Sq. Ft. Package Included: 6 packs Quiet And Effective The Ultrasonic pest repeller working with low-frequency ultrasound waves, no noise in the room can influence you and your pets. Most customers can see the results within 3-4 weeks! Then we can say goodbye to pests and mice! Wide Coverage The ultrasonic pest repellent is effective up to an area of 1600 SQ. It's widely used in homes, warehouses, offices, gardens, hotels, etc. Since ultrasound can not penetrate through walls and solid objects. It is recommended to put one in each room. As for large storage areas, we suggest installing 2 or more devices. A Continuous Process To Repel Pest √ Week 1:quick impact & run away from shelter √ Week 2:non-immune & nervous system damaged √ Week 3-4:intolerable & flee from home forever Why choose us 1. No any noise for driving pest. 2. Repelling many kinds of pests continuously and Powerfully. 3.Easy to use: Just plug in. 4.Pack of 2: One package solve all rooms Instructions 1. Keep distance from carpet, curtain and any sound absorption material that may reduce the effect. 2. The number of rodents and insects may increase in the first few days. And the pest repellent will drive them, away completely for good about four weeks later.