The Teltonika FMM640 is a professional worldwide tracker designed for use in a variety of applications including international logistics, refrigerated transport, agriculture, construction, mining, and emergency services. With LTE Cat M1 and NB IoT connectivity, the device supports the latest cost-efficient technologies. It features dual SIM capability, enhancing connectivity and coverage. This tracker is equipped with a built-in memory capacity of 0.002 GB and supports MicroSD (TransFlash) cards for additional storage. It includes a mini-USB connector and RS-232/RS-485 serial interfaces, allowing for integration with various third-party devices. The FMM640 also offers advanced data capabilities such as FMS CAN data (J1939), fuel CAN data (J1708), tachograph live data (K-line), and remote tachograph file download. The device is powered by a rechargeable nickel-metal hydride (NiMH) battery with a capacity of 550 mAh and a voltage of 8.4 V. It measures 104.1 mm in width, 76.8 mm in depth, and weighs 197 g. The tracker is housed in a black casing with an IP41 rating, indicating protection against solid objects and dripping water.