squeling on 2004 Nissan Altima

it starts at about 30 miles an hr, its a faint squeling, and then when i slow down it sounds as if it winding down im curious as to what u think it might b

Asked by for the 2004 Nissan Altima
It is potentially the "squeakers" on the brakes, that are telling you that your brake pads are worn and should be replaced.