This is the white fuse box below the fuse box withthe lil fuses u plug in. It supossivly controls the internal electronics. but since my aftermarket cd player blew it i need a new one. hopefully that doesnt blow agian but @ least it will work for a little bit. If you are parting out your car and you are kinda close to me, i will willingly come by and get it myself so u dont have to hassel with actually getting the right part. thanks id say like $5 or so im not paying more than 10 for it.