Thanks to the 1-Wire interface of Teltonika FMB640 GPS tracker you can be managing the (Driver identification) to avoid unauthorized driving in your service routes or deliveries tasks or connect different temperature sensors. FMB640 of Teltonika it is also a "GPS Tracker with voice call", you can make voice calls and communicate with FMB640 device through Bluetooth connectivity, ideal for their automatic vehicle dispatch. With the RS232 / RS485 ports you can connect to Teltonika FMB640 GPS tracker: Garmin navigation devices, RFID readers, external LLS sensors or others RS232 / RS485 devices. The real-time tracking and hours of service control of FMB640 GPS device with Can Bus of Teltonika it is usually done from a Tracking Management Platform always online, also accept (SMS commands, SMS messages via mobile phone) or allow to change configuration and firmware update via FOTA, FMB640 also can be use an REST API to connect existing applications. Teltonika FMB640 GPS tracker is a great solution for requirements of field service management in mobile asset or vehicles fleet management.