Emax Aeris TX is a 2.4GHz ELRS transmitter expansion module for small Nano radio shafts. The module is compatible with radios with OpenTX or EdgeTX firmware. ExpressLRS (abbreviated ELRS) is an open source project and both transmit and receive modules are produced by multiple manufacturers. ELRS is currently one of the most advanced RC transmissions. It offers reliable long-range link, high refresh rate, adjustable power, update via wifi and more. The ELRS at 2.4GHz outperforms conventional RC systems in all respects at the same frequency while maintaining short antennas.
ELRS has great community support. However, it is an open system that is rapidly evolving and changing. All information about ELRS can be found at here.
The Aeris TX features an XT30 connector to power an external 2-5S battery, extending the battery life in the radio. This is especially useful for long long-range flights and high transmit powers. Another advantage of the module is the USB-C connector, which is used for easy firmware updates or transferring telemetry to a PC in Airport mode. Active fan cooling is a matter of course.