... Monitor,Dead zone compensation,Low-voltage warning GPS Watch TrackerIII. LOCATOR FUNCTIONAL REQUIREMENTLocator functional requirements should have ... emergency situation, these telephone numbers are used for contacting.3.11 Center number set-up functionIt ... can set up a center number for locator by wireless mode, (i.e., SIM ... AND DOWNLINK GSM GPRS GPS watch tracker for child kid elderly car