Uses ultrasonic pulses to keep parasites, which are often the cause of asthma and allergic symptoms, away from beds, carpets, and the entire house. The ultrasound particularly prevents dust mites from reproducing. Works without chemicals or fragrances. The ultrasound operates at a frequency of 40 kHz, which is inaudible to humans and pets. The parasites are not killed but repelled, thus preventing them from reproducing. Device for home use. Can be powered through a socket (220 V). Effective range of 90 m³ (equivalent to a room of approximately 36 m²).