I wired my stereo system to use a constant power source with a kill switch so that I can turn it on and off without the key needing to be in the ignition at all. This is how I prefer to install my systems. I'm not good at write-ups which is why I don't usually do them. Sorry but I suck at explaining installation type things. I can explain how things work but not how to install them. Weird I know. The fob is rf for the remote buttons but it uses lfid (low frequency id) to identify that the fob is programmed to the system and allows the vehicle to start. In essence there are two antennas rf and lfid. Each with its own purpose. RF for remote buttons LFID for fob identification. I still retained my keystart (with working transponder) in the event I need to use it. I just relocated certain things to allow me to retain it. The factory key and fob are also able to disarm the entire push start/alarm system in the event I need it to. The push start/alarm system is the main and the factory system is the back up. If the push start/alarm system are tripped it activates itself (siren) and the horn as well as the factory alarm lights. I also integrated a hidden (except to me) touch key (like the ones you see under door handles on some cars) that requires a passcode in order to disarm the system and allow me to start it with the button if I lose my fob. I only posted the end result but this system took me a whole 2 weeks from start to finish to get it programmed and working properly.