Frequency Conversion Multifunctional Mosquito Repellent Features: The and electromagnetic chips of our pest repellers frequencies interfering the auditory and nerve system of the pest, making them feel uneasy and uncomfortable so that pest, mice, rodents and mosquitoe away from your home. Just plug the pest repellers into the socket. If the pest repellent displays a blue light and flashes, it means the pest is working normally. No battery required, just plug repellers and play. Please make sure to install it vertically 10-50 inch away from the floor. The frequency of the electronic mosquito repellent is inaudible to humans and pet, environmental-friendly,The rodent repellent plug-in does not insect, but removes them from the covered area without using che micals , which is an ideal choice for anyone who does not want to clean up for a long. This rodent repellent indoor is suitable for 1600 square feet of area, It's widely used in home, warehouses, offices, gardens, hotels, etc. We recommend you to install one for each room because the ultrasound cannot penetrate walls and solid objects. But for areas with serious Vermin, we suggest install 2 or more pest . The electronic indoor system is to use and safe around family, dog and. To use, just plug the unit into any outlet and let it go to work. efficient on mice, rats and roaches. Product details: Style Modern Material Metal Number of 1 Is Yes Nightlight Feature: provides a soft glow in the dark Output Power: 5W Voltage range: AC90V～250V, Output frequency: 20Hz～55Hz Effective Coverage Area: 1,200. Ft. 1 unit