Description: The product produces extremely low-frequency electromagnetic waves and high-frequency waves intermittently alternately, which can deter unwelcome pests, like mosquitos and mouse. The wave makes the pests feel uncomfortable, so the pests will flee away. Features: Suitable for use at home, in the office, supermarket, hotel, or storehouse, repelling pests effectively, 360 degree protect your home with no dead zone. Ultrasonic sound is inaudible to humans and household pets, 20-40dB low noise, non-toxic, no harm to human beings or pets. Generate electromagnetic waves and high-frequency waves at the same time, avoiding mosquito tolerance to single channel ultrasound. Plug the pest repellent ultrasonic in and it will start to repel the pests. Please place in a location where its noise will not be affected by walls and furniture. Since ultrasonic sound can not penetrate walls and solid objects, one room one pest repeller is recommended, bringing a pest-free environment. Note: It is a normal reaction when you find the rat more active for first use. After using it for 2 weeks, you can see the obvious effect. Specifications: Voltage: AC 90-250V Power: 5W Ultrasounic Frequency: 50Hz-60Hz Protection Range: 30-80 square meters under open environment Color: White Item Size: 9.8*5.8*2.9cm/3.85*2.28*1.14in Item Weight: 65g/2.29oz Package List: 1 * Pest Repeller