Check the listing for details. PIONEER AVH-4200NEX SOFTWARE ERROR SCREEN FIX SD CARD WITH OPERATING SOFTWARE. Condition: Open box. Listed at 37.50 USD. PLEASE READ EVERYTHING !!!!! DON'T BUY IF YOU LEAVE NEGATIVE FEEDBACK WITHOUT GIVING REASONABLE TIME FOR HELP/ RESPONSE........ WE ARE NOT SELLING ANY RADIO,THE LISTING IS FOR FIXING YOUR OWN DEFECTIVE UNITWE ARE OFFERING SD CARD THAT ONCE INSTALLED WILL FIX YOUR UNITIF YOU HAVE AVH-4200NEXTHAT KEEPS ON DISPLAYING SOFTWARE ERROR ON THE SCREEN JUST LIKE THE PICTURE SHOWS WE CAN HELP YOU REPAIR THE UNIT.AFTER YOU BUY THIS AUCTION WE WILL SEND YOU SD CARD THAT HAS THE OPERATING SOFTWARE.THE FRONT PART THAT HAS LCD SCREEN AS WELL AS THE SURROUNDING BLACK BEZEL MUST BE REMOVED IN ORDER TO GET TO WHERE SD CARD IS LOCATED.YOU WILL NEED TO KNOW HOW TO INSTALL THE SD CARD ON YOUR UNIT OR SEEK PROFESSIONAL HELP.PLEASE LET US KNOW IF YOU HAVE ANY QUESTIONS AND WE WILL BE HAPPY TO ANSWER THEM THE BEST WE CAN.THANK YOU