Detailed Description  Tracking via SMS or GPRS (TCP/UDP) Current location report Tracking by time interval Two-way conversation SOS alert Geo-fencing control Low battery alert Speeding alert Alert when GT30 enters/exits GPS blind area Alert when GT30 is turned on Three buttons for calls and/or sending message Applications: 1.Guard against theft of strongbox, vehicle and outdoor equipments, Cargo 2.Monitor and protect child, elder and disabled 3.Based on GSM network and INTERNET, this series of products provide personalized services for companies, organizations and individuals, users can search the positioning or movement tracking information provided by this product in mobile phone or personal computer,etc.