There is a constant drain on the battery, about.

OK --I TRIED MY LINK----IT WAS NOT WHAT I WAS LOOKING AT (SOMEHOW IT GOT MUFFED)

ENTER "STEREO" INTO THEIR SEARCH BOX, IN MY LINK ---PAGE 2 SHOWS THEIR RADIO EQUIPMENT

THE MEDIC

Amazon is going to cheaper and better selection kenwood is a good choice for a cheaper stereo sonys no unless your speeding over 300.