Description Upgraded Ultrasonic Pest Repeller, 4 Pack Pest Repeller for Insects, Insect Repellent for Cockroach, Plug-in Insect Repeller for Mosquitos, Flies, Roaches, Rats, Mice - White . * Plug in and Play: The plug in insect repellent is very easy to use, just plug into power socket and start working. Mouse Repeller can help you to get rid of pests. Spider repellent shall be avoided from curtain fridge, and any other obstacle that deterring or attaching frequency. . * Safe And Environmentally Friendly: Electronic insect repellent makes pest cant develop immunity and adaptability. Force insect to run away from your home. Giving off No noise and radiation, free from dangerous chemicals or smells. No harm to health of babies, pregnant and pets. . * Safe And Environmentally Friendly: Electronic insect repellent makes pest cant develop immunity and adaptability. Force insect to run away from your home. Giving off No noise and radiation, free from dangerous chemicals or smells. No harm to health of babies, pregnant and pets. . * Safe And Environmentally Friendly: Electronic insect repellent makes pest cant develop immunity and adaptability. Force insect to run away from your home. Giving off No noise and radiation, free from dangerous chemicals or smells. No harm to health of babies, pregnant and pets. .