BRISON Ultrasonic Pest Repeller Plug in Control Electronic Insect Repellent Gets Rid Mosquito Bed Bugs Roach Spiders Fleas Mice Ants Fruit Fl (4 Pack) DOGS These won't rust or corrode ITITIT5CWSQ5 These won't rust or corrode while the carbon block filters work to remove many harmful contaminants a SANITARY: Ultrasonic home pest repeller is safe even for the pests making them leave your area without you finding dead bodies of insects all around the morning after switching on the device EASY IN USE: The only thing you need to do to make it work is to plug this electromagnetic pest repeller into the wall socket and press the button for three seconds – the device is ready to go