Patent ID: 7868745

Claim:
A portable personal convenience device carried by a person having access to a transportation vehicle comprising: personal convenience means for performing a non-transportation related convenience function, said personal convenience means further including an expansion slot; and a passive entry device integrated within said personal convenience means and adapted to interact with said transportation vehicle for passively gaining access thereto, said passive entry device comprising: a receiver for receiving an interrogating signal from an electronic control module in a vehicle; a transmitter for broadcasting a response signal to said electronic control module; and a controller for controlling the transfer of said response signal to said electronic control module in response to a validity of said interrogating signal; an interchangeable plug-in module received in said expansion slot for receiving electrical power from said personal convenience means, wherein said plug-in module includes an algorithm for performing passive-entry vehicle functions, and wherein said plug-in module includes a plurality of identification codes and messaging protocols for accessing more than one transportation vehicle.