Advanced: generate electromagnetic wave and ultrasonic wave at the same time.Frequency: change constantly and intermittently, but not periodically.Adjustable wave band: 1 band(25-70KHz) and 2 band(10-70KHz) for different situations.Comfortable: with nightlight function, soft blue light can also boost the repelling effects.Safe: use physical method, non-toxic, no harm to human beings or pets.Powerful: the effective protection range is about 200 square meters under open environment.Suitable for using in household, office, supermarket, hotel or storehouse, repelling pests effectively.Specifications:Color: WhiteMaterial: ABSVoltage: AC 110-240VPower: 6WElectromagnetic Wave Frequency: 0.8Hz-8HzUltrasonic Wave Frequency: 1 Band: 25-70KHz; 2 Band: 10-70KHzProtection Range: About 200 square meters under open environmentNote:1. Please choose 1 band Ultrasonic Wave if you raise pets at home, because 12-20KHz ultrasonic wave would have some effects on pets.2. It's normal reaction when you find the mouse more active for first use. After using for 2 weeks, you can see obvious effect.