I hate to sound like a Dynon salesman, but it IS a complete, easy to understand and install system. Most everything is an optional add-on module (box) that can be added later if you choose, even radio and intercom. Transponder and GPS is all ADS-B 2020 compliant. A costly but nice option for those leery of wiring is their wiring interface panel which includes circuit protection and is basically plug and play with pre-made wiring harnesses. All this is also true of Advanced Flight Systems (owned by Dynon).