Emergency calls setting 3 speed dial telephone setting Supports GSM 900, 1800, and 1900MHz band Supports mobile phone SMS setting and SMS provide longitude/latitude coordinates Supports one-key dialing out function of fixed phone number Set mobile phones to receive alarm SMS from terminal (limited to mobile phone) Supports SMS password setting Low power design Regularly return interval time setting Can be with the existing functions of the school integration of ICT Can set alarm clock via SMS Shell can be replaced Supports map display to view the current location of the terminal Supports view terminal history Supports regional settings, can alarm once the terminal enters/leaves the location Set 3 speed dial number to call