The invention is a device, and a method of operating the device, for use
in a wireless network, where the device may have to run on battery power,
or other limited energy sources. The device saves battery power by
employing two wireless radios. The primary radio is a fully featured unit
that supports full network communications protocols. The secondary radio
is a simple device, possibly of shorter or longer range, which is capable
of rudimentary receipt, and possibly transmission, of simple
communication. Such a secondary radio can be chosen to have significantly
less power consumption than a fully featured radio. Thus the device can
be operated, in a variety of novel schemes, with the secondary radio on
and the primary radio off. The primary radio need only be turned on when
full communication is required. Typically radio communication is the
primary power draw in portable wireless devices, so the novel device can
operate on less power than existing devices.