You can use 3 GPS tracking modes to locate the mobile asset that has installed an ST4940 NB / IoT GPS tracker: (sending SMS text messages with commands, from an external tracking management platform "edit IP/port on tracker config", using Suntech online server). Suntech ST4940 integrate a "panic button" that help to protect your mobile asset driver when feel any danger, when the mobile asset driver click on the "panic button" ST4940 send "SMS alerts by panic button" to a predefined mobile phone or also to the GPS tracking services. ST4940 dispose of a rechargeable (3000mAh/3.7V) battery that can be cover different types of requirements to GPS asset tracking, contact with Suntech to know how many time during a single battery charge of ST4940 standalone GPS tracker. You can be acquire Suntech ST4940 NB / IoT GPS tracker with 2 different "IP" certifications: (with holder IP66 - without holder IP65), ideal for GPS asset tracking in extreme weather conditions. ST4940 can be send data in the (M1/NB IoT - LTE FDD Cat.1) networks and can be configured through SMS commands, these Suntech NB / IoT GPS tracker is an economic alternative and robust for solutions in the GPS asset tracking and lone workers tracking.