You can delimit in GV56RS GPS vehicle tracker up to "20 polygonal virtual geofences - 20 circular virtual geofences" depending of your needs or requirements, you receive in your mobile phone the "SMS alerts by virtual geofences" when Queclink GPS tracker cross any of the preconfigured geofences. The real-time tracking of your vehicle can make it with 3 different modes through Queclink GV56RS GPS tracker: (using the Queclink online server, from an external tracking management platform "edit IP/port", sending SMS text messages with commands), the tracking modes can be change via SMS or PC. GV56RS GPS tracker offer the follow analysis over the "driving behaviour": (crash detection "reconstruction and analysis", aggressive driving detection, harsh braking, harsh acceleration), when Queclink GPS tracker detect excess in the "driving behaviour" sends the data packets with information to tracking management platform. Vehicle temperature control in real-time if connect an "external temperature sensor" to the (1-Wire) interface of Queclink GV56RS device, via (1-Wire) also can manage the drivers identification with iButton. Queclink has designed GV56RS tracker with internal (Bluetooth) antenna, that allow send data packets and make 2-way communications with your vehicle drivers.