When you turn of the trike power by setting the key switch to off, you engage the GPS Alarm. In this mode, the GPS Tracker will optionally monitor vibration, speed, position and power, and provide you optionally with SMS and Call notifications if something unusual happens, such as trike being moved, driven, etc. On the web app an alarm notifications will also appear for each unusual event. You can follow the trikes movement in real time on the APP.