SWC/Backup Camera Plug-n-Play Harness with 6-Volt Turn-On Axxess AXBUCS-NI406V is a wiring harness designed specifically for Nissan Maxima vehicles from 2016 onwards that do not have a factory amplifier. It offers two key functionalities for enhancing your car audio experience when upgrading to an aftermarket stereo system: Pre-Wired AXSWC Harness: This simplifies the installation process. The AXBUCS-NI406V comes pre-wired for the AXSWC interface (sold separately), which allows you to retain the functionality of your steering wheel controls (SWC) with your new aftermarket stereo. These controls typically include functions like volume adjustment, track skip, and phone call management, providing a convenient and safe way to control your music and calls without taking your hands off the wheel. Retains Factory AUX-IN Jack: If your Nissan Maxima has a factory AUX input jack for connecting external audio sources, the AXBUCS-NI406V allows you to retain this functionality with your aftermarket stereo system. This provides you with an additional option for music playback using a wired connection. The AXBUCS-NI406V is a valuable tool for Nissan Maxima owners (2016 onwards, without factory amplifier) looking to upgrade their car audio system with an aftermarket stereo while maintaining functionality of their steering wheel controls and factory AUX input jack. Focuses on SWC and AUX Retention: The AXBUCS-NI406V primarily focuses on retaining steering wheel control functionality through the pre-wired connection for the AXSWC interface (sold separately) and maintaining your factory AUX input jack Retains the factory AUX-IN jack Retains the factory backup camera to an aftermarket radio Includes the AXCSD-6V 12-volt to 6-volt converter Separate AXSWC Interface Required: It's important to note that the AXSWC interface itself is not included with the AXBUCS-NI406V and needs to be purchased separately