The Trail Rocker 57005 Jeep JK unit is a complete separate stand alone system. Here is a picture of it mounted in the engine bay of a Jeep JK (mounting kit included). It’s a very heavy duty unit and you can see the robust red power lead and safety fuse leading into the unit. You do have to add the switches or one of switch kit options from Painless, but everything else is included. There is value to having stand alone system that is not tied into the stereo regardless if the stereo head unit is stolen or dies. The Alpine KAC-001 external accessory control module that links to a Alpine Touch Screen receiver is nice also. You control the accessories through the touch screen. The way I see it is that these are 2 completely stand alone systems that can control 8 accessory items. You will need to buy the separate relays and some wiring for the Alpine unit. It is rated for low output accessories. Hope this helps.