Your question is not very clear.
"Riddex" is a product that you can plug into your power outlets to keep pests away. Products such as "Riddex" are not recommended, and have been investigated by the Federal Trade Commission.
These digital pest repellents claim to send a certain type of electricity wave through your electrical lines to provide pest control. These products are gimmicks and a scam.
More informtion about the investigation can be found here