This Amp Interface Module with Steering Wheel Control Retention for select 2003 to 2014 Lexus|Toyota vehicles allows you to easily remove the factory stereo and replace it with an aftermarket stereo and retain factory functions. Provides accessory power |12 volt 10 amp| and NAV outputs |Parking Brake and Reverse|. Retains R.A.P. |Retained Accessory Power| audio controls on the steering wheel factory Aux In jack balance is Micro B USB updatable and is designed for amplified models. Includes pre wired ASWC 1 harness.Provides accessory power (12-Volt 10-Amp)Retains audio controls on the steering wheelMicro b USB updatableProvides NAV outputs: parking brake reverse speed sense