General description Are you bothered by various pests? The Ultrasonic Mosquito Repellent Plug utilizes automatic frequency conversion ultrasonic technology to emit 20~55KHZ ultrasonic waves, effectively stimulating the hearing and nervous systems of mosquitoes, cockroaches, mice, and other pests to repel them from your home. This device is designed to help you maintain a clean and tidy living space. Technical specifications Rated Power: 5W Power Voltage: AC90~220V Power Frequency: 50 ~ 60 Hz Dimensions: 9 x 6 x 5 cm Weight: 0.32 kg Effective Range: 80-120 square meters Usage For optimal results, it is recommended to install one ultrasonic pest control device in each room. In larger areas, two units may be necessary. Please keep doors and windows closed to ensure the ultrasonic sound effectively reaches the pests. It is normal to observe increased pest activity during the initial weeks of use, as the device works to drive them away. Other information Package includes: 4 packs Note: