Bell & Howell® Ultrasonic Electromagnetic Pest Repeller helps rid your home of all kinds of creepy crawlies! Safe, chemical-free unit uses both ultrasonic and electromagnetic technology to repel unwelcome mice, ants, roaches and other vermin without killing them. No fumes, no mess, no traps or poison and it works through walls! Use one for an entire floor! Safe for use around pets and food. Unit plugs into a standard wall outlet and has a handy bonus side outlet feature built right in!