The MTX-LTE-C3-AUDIO is an industrial IoT modem ready to work in 4G (LTE), 3G and 2G networks, designed for applications that require high-speed and low-latency data transmission speeds. In addition, the MTX-LTE-C3-Audio supports voice applications, since it has an embedded audio codec. It is a stand-alone modem with its own SIM card reader and a high-speed USB 2.0 and RS232 interface, which minimizes the need for additional hardware.