NEWEST MICROCHIP TECHThis ultrasonic repellent works by emitting a disorienting pulse. This ultrasound technology is very effective in pest control. Pests will be scrambling to find a way out of your home! SAFE & ECO-FRIENDLYNo chemicals, non-toxic, no smell, no radiation, no need to clean faeces or corpses of pests, no more need to call pest control technician for help. Environmental friendly alternative to dangerous poisons and Sprayers, chemicals and traps. 100% safe to human and pet, besides save you a lot of money and worry. WIDE COVERAGEThe effective of spider repeller coverage area of one pest repellent is 1200 Sq. Ft. As the ultrasonic cannot across through wall and solid objects, it is recommended to install one mouse repellent for one room or several rodent repellers for a big house. WIDE APPLICATIONIS Our bug repellent can help you drive away all the pest, like spiders, mice, mosquitoes, rats, roaches, ants, moths and so on. Great for indoor use, such as bedroom, kitchen, office, warehouse, hotel, etc. Besides, blue night light can provide you a sense of safety, sleep comfortably and a pest free environment.