Dust mites are a major contributor to many allergic disorders such as asthma and eczema. What's more, over exposure can result in you developing new allergic reactions. Thankfully this Dust Mite Controller is the simple and effective solution. Just plug it into the mains power supply and, without chemicals, it emits virtually silent pulses of ultrasonic waves, which interfere with the growth cycle of the dust mite and inhibit its ability to reproduce. In just a few weeks, it will dramatically reduce the dust mite population and help relieve allergies. With a range of 80m3 the Dust Mite Controller will easily cover an entire, average sized bedroom, and is effective against dust mites in mattresses, bedding, pillows, carpets, upholstery and curtains.