PAC TATO JBL Amplifier Turn-On Interface for Toyota Vehicles Retains the use of the factory JBL amplified audio system when the factory radio is replaced with an after market radio Retains the factory functions of balance and fade.Direct plug-in for SWI module to retain steering wheel controls Simple plug and play connectivity Compatible with the 5.1 and 7.1 Synthesis surround systems Retains JBL or JBL Synthesis amplifier Adjustable gain settings for optimal audio configuration Retains balance and fade capabilities Quick and simple installation