This package inludes the Lido LM-300 22 inch version, Mic holder and the adapter plate for your Yaesu FTM-400, FTM-350, FTM-100 or FT891. The adapter plate can be threaded direclty into the control head, nothing else to buy.The mount can be installed in just a few minutes with no drilling required. Just loosen the seat rail bolt under the passenger seat, slide the bracket under the rail and tighten. Please make sure you can access your seat bolt before purchasing.