CelReal gps tracker, watch gps locator for Elderly / child business person field staff 1. 2 speed dial alarm buttons and one SOS button; Support 3 preset phone numbers and two-way talking function; 2.SOS signal can be sent to the control center if the SOS button is pressed, so as to indicate the user's location precisely; .The guardian can search the user's location directly through message without the need for monitoring system; Support active and passive monitoring; 3,Display time, speed, coordinates and altitude; Support time setting and continuous/discontinuous tracking functions (System support is required); 4.Support the electronic fence function, and give alarm if exceeding the designated range (System support is required); .The monitoring center can search the user's location through message/GPRS (System support is required); 5.Track recording function, historical track playback function (System support is required); Low power alarm