Features: Physical mite removal, no radiation. Physical sound waves, no noise. Intelligent power saving chip, 1kWh per month. The effective range is about 80-100 square meters, for family use, it is recommended that each room. Widely used in homes, warehouses, shops, restaurants, hotels, offices, etc. Multi-purpose machine, can be used to remove mites, mosquito repellent/insects/rat. Rest easy using , protecting you from harmful bed bugs, dust mites and insects by emitting ultrasonic and electro magnetic waves that attack the p-ests central nervous and auditory systems, and these waves are completely inaudible to human beings and pets. This product relies on a microprocessor to create a forcefield in your home. It emits ultrasonic soundwaves and pulses that randomly create digital sequences which prevents p-ests from breeding and eating. This product also switches its frequency mode constantly, preventing mites from adapting and immunizing at a fixed frequency. It also has a low power consumption and long operation time of up to 10 years. So you don\'t need to worry about expensive electricity bills or replacing the device after a couple of years.