Limited or not.(I don't know what version it is) You can run a new Legacy locomotive with any smart phone tablet etc and nothing else is needed.
Your phone communicates directly with the locomotive.
This is unlike Mth where you still need a TIU as well as A WiFi unit for Bluetooth operation because your phone merely takes the place of the DCS handheld.
Here's a link to Lionels FREE app: http://www.lionel.com/bluetooth/