You have to buy or build a power supply, that had the obdi connector which plugs into the Mobley
You also have to give the mobile connect department the Mfg model of a vehicle
One that is listed in their data's base as being compatible
After reading on Howard's forums it is clear that the device works very well and users are happy
But the assembly power supply, Mobley, wiring etc is not as compact and portable as a mifi, no built in battery, no small wall wart charger
Put this in a cabinet in the middle of the RV or stick house, and leave it there
You really should go read the Howard forums thread on this before committing to the idea
This is a DIY project when used in the RV, instead of the listed option vehicle