Queclink 3G Car Motorcycle Vehicle GPS Tracker Worldwide, GTM GV75W Waterproof Real Time Locator w/Geo-Fencing Emergency Alarm Extended Backup Battery Driving Behavior Monitor Multi-Purpose Reporting

Geofences are virtual fences or perimeters around the physical location. Geofences detect when someone comes in or leaves the given region. When this happens, it is possible to trigger events and actions, such as sending a notification to the users' mobile phone. That's great, Daniel. But how does it work? As a user moves around with her phone, a new position is calculated every now and then from a variety of different sources, such as Wi-Fi and cellular data, GPS and Bluetooth beacons. The phone uses the updated position to check if the user has entered or left any of the geofences, and in this case, it triggers the corresponding actions. These actions can let the user know that they have entered the geofence, for instance by displaying a notification. However, they can also be silent without informing the user. Such would be the case if you wanted to track how many times the user has