Not a retarded question...alot of people ask me that. It's the receiver for my satelite radio. I didn't want to change out my stock head unit so i could keep the car in factory looking condition. So i decided to go with the modulated XM radio package. I couldn't find a place on the dash for it that looked decent so i flush mounted it in the headliner. Thus keeping the stock look on the dash. It works out great!
Cheers
rimmie
