Queclink GL520 Standalone GPS tracker sent data through (TCP, UDP, SMS) protocols, accept SMS commands and the best solution to control Queclink GL520 in real-time is from a Tracking Management Platform always online. You can setup on the GL520 GPS device of Queclink some preventive SMS alerts: (geofences, low internal batteries power, wake up device alarm), you receive a SMS message when are active one preventive alert. Receive exact "Geo Location" of Queclink GL520 Standalone GPS tracker on your mobile phone every time that GL520 GPS tracker cross a virtual geofence (up to 5 internal geofences). GL520 of Queclink is a Standalone GPS device valid to different requirements on Mobile Asset management control such: GPS Container tracking, heavy machines, power generators, etc... In addition, Queclink GL520 Standalone GPS tracker allow to change any configuration parameters or firmware update through OTA (Over the Air) function.