Before revision: Function Activated Sony single DIN head unit , playing Bluetooth audio Central to a vehicle's sound and information systems, head units are located prominently in the center of the dashboard or console, and provide an integrated electronic package.
After revision: Function A single DIN head unit with large rectractable touchscreen, DVD, GPS Central to a vehicle's sound and information systems, head units are located prominently in the center of the dashboard or console, and provide an integrated electronic package.