| http://www.w3.org/ns/prov#value | - It can also be concealed in jewelry, such as rings, bracelets, earrings, necklaces, pins and the like. [0032] In use, the interrogation signal transmitter 16 and RF-Key 20 must be within a predetermined operating distance (read range) of each other in order for the RF-Key 20 to transmit a password 22 in response to an interrogation signal 17 from the interrogation signal transmitter 16.
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