The LAI10 allows you to replace your factory OEM stereo while retaining factory steering wheel controls if the vehicle is equipped. This interface will maintain the data-controlled +12V accessory output as well as provide navigation outputs for reverse vehicle speed pulse and park brake. Provides analog plus output for vehicle speed ground output for parking brake engagement plus 12V output for variable dash illumination and reverse trigger. Retains steering wheel and phone control buttons (for compatible radios). Includes universal head unit steering wheel connection harness for most aftermarket brands: Alpine Clarion JVC Kenwood Pioneer Sony and more. USB updates via Scosche RFM (Sold Separately). Retains Audi BOSE systems with LINK+ LP2EUAR Module (Sold separately).