Allows owners of the Toyota RAV4 to retain the use of the factory multi-functional steering wheel control buttons including phone buttons, aux input as well as the amplified system. This harness also aids in the retention of the four factory reversing cameras, allowing for 360-degree camera functionality. The interface allows the aftermarket stereo to interpret and interact with the factory camera information as if it were the original system. Please note: the language of the vehicle must be set prior to installation. This product does not support the amplifier fade feature.