WHAT'S INCLUDED - Complete remote start system compatible with Chrysler 300 2019-2023. Includes an all-in-one remote starter data interface module and T-Harness. Firmware preloaded for your vehicle. All components required for installation are included. Automatic Transmission ONLY Requires Windows PC with USB port to complete set up. REMOTE START FEATURES - This is an Add-on remote start system for vehicles with existing keyless entry. Does not include remotes - this uses your factory remotes to start your vehicle by pressing "lock - unlock - lock" on your factory remote - No Horn Honk while starting your vehicle. No need to carry extra key fobs! Warm or cool your car from the comfort of your home. PLUG & PLAY INSTALLATION TYPE - This kit uses a plug-in T-Harness which dramatically reduces number of wiring connections that typical systems require. The installation of this product will require only the plug-in connection. We provide concise instructions with plug locations for seamless installation. Adding additional options may require additional wiring connections. A person with basic knowledge of wiring car electronics should be able to install this product successfully. ALSO INCLUDES - Flash Link Updater tool that allows you to complete key programming using a Windows PC. OPTIONAL - Smartphone app interface module available separately (shipping limited to the continental U.S.). -- RFK411 1-Button 1-Way Remotes. -- RFK441 4-Button 1-Way Remotes. -- RFK442 4-Button 2-Way Remotes. MPC TECHNICAL SUPPORT - United States, Tucson, AZ. Several different methods of support available. QR code instructions included to ensure the most up to date information. Product my not work in vehicles manufactured for sale outside of U.S. & Canada.