Rodentzout ProThe Pestgard Rodentzout Pro is an original 5 in 1 plugin electronic rodent and pest repeller. Using advanced, patented technology, the rodentzout system protects your home from rodents and other pests. The unit uses three functions; ultrasonic, ionic and electromagnetic to deter rodents. Simply plugin to a power supply and you're set to go. no chemicals no poisons no mess easy to use safe for humans and pets An effective deterrent for rats and mice.