Check the listing for details. DTMCare 4 in 1 Multiple Function Pest Repeller with LED Night Light.. Color: White, Condition: New. Listed at 19.95 USD. Features: Electro-Magnetic Wave: Uses an intermittent varied physical signal to emit a magnetic-vibrating wave, passes by connected power or ground lines that makes pests hiding in the walls uncomfortable and non-viable in order to repel them effectively.Ultrasonic Wave: Uses a high pitch sound that is unheard by humans but frightening to mice. The sound attacks the pests continuously in order to repel them effectively.The unit uses the vibrating magnetic wave and the pulsed supersonic wave to effectively attack mice, rats, and pests, giving them no where to hide.The unit uses the super powerful two-emit dual speaker to create auto-sweep ultrasonic wave. It is effective up to 2,100 square feet. For maximum effectiveness, install a pest repellent in each separate room.Durable; Low Energy Cost; Non-Chemical; Harmless to Human, Pets, Household Electric Products & Computers; With EPA #074132-TWN-001.Descriptions: The “4 in 1 Multi-function Pest Repeller ”, a technically advanced environmental product, which will help you effectively repel mice, cockroaches, ants, fleas, spiders and a majority of rodents. It is the best way to repel pests and take care of environmental sanitation at the same time. The “Ionic” creates a steam of beneficial negative ions which pull pollutants and bacteria out of the air before they reach to your lungs. The ion is also effective to repell ants, cockroaches, spiders and other insects. Also the “Night Light” will turn on automatically in the dark. The unit can be used in houses, restaurants, warehouses, supermarkets, bakeries, grocery stores, department stores, factories, and older buildings. Works on rat, mice, ants, cockroaches, silverfish, earwigs, waterbugs, centipedes.