All necessary hardware included for easy installation Compatible With Toyota Celica 2000-2005 Toyota Echo 2000-2005 Toyota MR2 Spyder 2000-2005 Toyota RAV-4 2001-2005 Tools Needed (sold separately) Phillips screwdriver Socket wrench Cutting tool Note: This Installation Kit DOES NOT come with a Chime Interface, because these are built into the factory radio and you will lose the warning chimes. Also this Harness will NOT retain OnStar if equipped. It DOES NOT work with vehicles that have a premium Bose factory sound system. This Dash Kit will work with standard Single DIN stereos only. Please check compatibility to make sure this works with your vehicle if you have any question don't hesitate to contact us for more info. Includes Radio Housing Mounting Brackets ISO Brackets Trimplate 70-1761 Wire Harness or similar