When Queclink GL501MG lost coverage in the (LTE Cat M1/NB1 - LTE TDD) networks, activate the "Bluetooth 4.2 BLE" connectivity to continue transfer data packets to GPS online server. With GL501MG NB / IoT GPS tracker can be temperature monitoring of your mobile asset, thanks to his "internal temperature sensor", contact with Queclink to know the temperature limit that support the "internal temperature sensor". The GPS asset tracking with GL501MG GPS tracker you can made in 3 different modes: (from Queclink company online server, sending commands with SMS text messages, using an external tracking management platform "edit IP/port in device config"). To prevent fraud or theft, Queclink GL501MG offers up to "5 virtual geofences" that you can delimit depending of your need, when your mobile asset cross any of the "virtual geofences" GL501MG sending an alert to a mobile phone and also to tracking management platform. Queclink include the (OTA - Over the Air) function in GL501MG NB / IoT GPS tracker, you can be firmware update or edit config parameters remotely without quit GL501MG tracker of your mobile asset, Queclink also offers an extra option to acquire a magnetic holder, ideal for requirements of spy GPS asset tracking.