A remote tester for a radio frequency beacon includes a plug-in module
insertable into a cooperating slot in a handheld computing device so as
to communicate data between the module and the computing device, wherein
the module includes an antenna, at least one radio frequency receiver
cooperating with the antenna so as to receive radio frequency signals
from the beacon, a processor cooperating with the receiver, and a host
interface for coupling in the slot with the computing device for data
interchange between the processor in the module and a processor in the
computing device.