Description: Function: The product adopts special frequency to act on the auditory nervous system of the mites, making the physiological system disorder irritability, loss of appetite, and gradual death. Perfect for releg sneezing, coughing, aids and eczema symptoms.Dust mite allergens are thought to be related to half of all rhinitis and Hayfever Safety: Inaudible and safe to humans and pets due to the 60-80 db . Easy to Use: Just plug in the usb interface and power on.and place it in an accessible location to get 24-hour protection. Occasion: The effective range is about 60-100 cubic meters, widely used in homes, warehouses, shops, restaurants, hotels, offices, etc. Specification: Material: ABS Application Range: 60-100cubic meters Power cord length: about 4 meters Rated voltage:<0.5W Rated power: 5V Rated frequency: 50/60HZ (HZ) Size Chart: 11.3x3.8cm/4.45x1.50 inch Package Includes: 1 Piece Mite Removal Instrument Note: 1.Please allow 1-3mm error due to manual measurement. 2.Wish you a wonderful on-line shopping!Easy to Use: Just plug in the usb interface and power on.and place it in an accessible location to get 24-hour protection. Perfect for releg sneezing, coughing, aids and eczema symptoms.Dust mite allergens are thought to be related to half of all rhinitis and Hayfever. Function: The product adopts special frequency to act on the auditory nervous system of the mites, making the physiological system disorder irritability, loss of appetite, and gradual death. Safety: Inaudible and safe to humans and pets due to the 60-80 db. Occasion: The effective range is about 60-100 cubic meters, widely used in homes, warehouses, shops, restaurants, hotels, offices, etc.