A wireless transceiver (5008) includes a low power radio frequency (LPRF)
component (5010) that powers down to conserve energy and powers up in
response to a signal; and a second receiver (5014) that provides the
signal via line (5018) in response to receipt of a radio frequency
broadcast. The broadcast is targeted to activate particular transceivers
by including in the broadcast identifications such as class designations,
in which case the transceivers power up and form networks. A transceiver
may include one or more identifications and may include a unique
identification of the transceiver itself. The LPRF component may be a
Bluetooth radio, but the overall transceiver itself only draws about 10
to 15 .mu.A while actively awaiting and screening for a targeted
broadcast.