If you haven't learned by now, you should never buy anything sold on TV...! I have used this riddex thing for OVER a year and it does not work at all. I have even place both plug ins in the kitchen and still rats, roaches and even lizards run around un-effected. While my dwelling is not infested nor over-run by the pests, it is not completely pest free either. Also, I am a very, VERY clean person. I make sure to clean and sanitize kitchen everyday with out fail! And yet the RIDDEX unit seems to attract the pests!!! Do NOT waste your time or money!!! read full review »