1、Ultrasonic dust mite controller helps to remove dust mites at home bed, sofa, blanket, curtain and so on 2、With intensified double outlets design, it produces variable frequency ultrasonic wave with 360 degree effect, removing mites effectively 3、Human cannot hear this product's ultrasonic wave, so it is no harm to human, pets and you can rest assure to use it 4、It's easy to use. Just plug the device into electrical socket and it starts to operate 5、Suitable for home, restaurants, hotels, hospitals, etc Description: This ultrasonic dust mite controller emits a range of ultrasonic sounds undetectable by humans or pets which interferes with the reproductive cycle of the dust mite. It is perfect for removing dust mites at home bed, sofa, blanket, curtain and so on. Features: Ultrasonic dust mite controller helps to remove dust mites at home bed, sofa, blanket, curtain and so on. With intensified double outlets design, it produces variable frequency ultrasonic wave with 360 degree effect, removing mites effectively. Human cannot hear this product's ultrasonic wave, so it is no harm to human, pets and you can rest assure to use it. Suitable for home, restaurants, hotels, hospitals, etc. Specifications: Condition: 100% Brand New Material: Plastic Shell Color: As Picture Shown Power: 1~3W Effective Area: 40~80㎡ Area Size: Approx. 9.5*5.5*3cm/3.74*2.17*1.18in Weight: Approx. 78g Package Included: 1 * Ultrasonic Dust Mite Controller Note: 1. Please kindly make a note if you need any adapter. 2.This product adopts high-tech electronic technology producing variable ultrasonic frequency instead of the use of chemical drugs, therefore it cannot be immediately effective, and, in general, the elimination of mites will gradually show the effect about 2 weeks or more.