In addition of the real-time GPS tracking, in your Xexun XT107 GPS tracker you can configure the following SMS alerts to protect the person that have the device: (movement alert, overspeed alert, low battery alert, shaking sensor alert), every time that an alert is activated you receive a SMS message in a predefined mobile phone. Also, by default XT107 GPS device of Xexun has a Panic button that it utilized to send S.O.S emergency messages when the person detects any possible danger situation and you receive the message in your mobile phone. Xexun XT107 GPS tracker also allow to configure different virtual geofences and if the person enter or leave of the geofences the device send the exact Geo Location in a SMS message to your mobile phone. The better feature that offer XT107 GPS device of Xexun is: that allow you to change configuration parameters or firmware update with the OTA (Over the Air) function, with this function you can reduce many costs.