Car Audio Deals Is This Car Audio Deal Worth It?

Is this car audio deal worth it? - car audio deals

Here is a link to the job
http://www.walmart.com/catalog/product.do?product_id=7788881&sourceid=18138002874069853971
I had no information on this model. Pls help
I would also like to know whether it is a pre-amp to connect to an amplifier and sub connection.