Riddex Plus removes pests such as rats, mice and roaches without the use of chemicals or poisons. Riddex Plus works with the use Digital Pulse Technology that creates an irritating environment for the pests forcing them to leave you home or business. With Riddex Plus, there are dead bugs to clean up, and it doesn't just chase pests awat but prevents them from returning. For a limited time, buy one Riddex Plus and get a second one free.