Unit NB-IoT The NB-IoT wireless communication module applicable to the global range Cat-NB frequency band. Built-in SIM7020G communication module, using serial communication (AT command set control), integrated SMA external antenna interface, improving the device communication quality and signal stability, SIM7020G module is the best low-latency, low-throughput application The excellent solution is very suitable for IoT applications such as metering, remote control, asset tracking, remote monitoring, telemedicine, and shared bicycles.