iDatalink Maestro ADS-MRR Steering Wheel Controls and Factory amp Retention w/Toyota HRN-RR-TO1 Interface and a Free SOTS Air Freshener Allows installation of new car stereo in select Toyota vehicles to retain the use of your steering wheel audio controls and factory amp retains factory convenience features (OnStar, SYNC, Uconnect, and more) with select Kenwood, Alpine, and JVC touchscreen receivers displays engine performance data on touchscreen with select Kenwood, JVC, and Alpine navigation receivers ADS-MRR and HRN-RR-TO1 Included FREE SOTS Air Freshener Included