Patent ID: 8068022

Claim:
A system for monitoring a location of persons or objects, comprising a. at least one tag unit adapted to transmit data signals of a first type identifying said at least one tag; b. a wireless device for receiving data signals of a second type, wherein said wireless device is carriable by a monitoring person; and c. a portable converter unit, that is carriable by said monitoring person, that receives the data signals of the first type from said at least one tag unit, converts the data signals of the first type to data signals of the second type, and transmits said data signals of the second type to the wireless device, wherein said data signals of the second type are transmitted according to a protocol that is applicable for said wireless device; wherein said converter unit extracts indication of a distance of each of said at least one tag units from said converting unit, based on intensity of the signals that are received from each of said at least one tag unit, and wherein the wireless device displays graphic display responsive to the indication of the distance of each of said at least one tag units from said converting unit.