This Micro TX is designed by Happymodel and based on the open-source ExpressLRS which is a very popular low latency and high re-flashed rate RF module for RC Airplane and FPV Racing. Its main hardware architecture is ESP32, ESP8285, and the SX1280 RF chip. The ES24TX module is a complete solution that is plug and play and already pre-loaded with Expresslrs firmware.
The ES915TX module is a long-distance 915mhz wireless transmission developed and designed based on the ExpressLRS open-source software. The ES915TX is characterized by ultra-long-range, stable operation, and low latency. This module is compatible with most Opentx remote controllers, especially suitable for Radiomaster TX16S and Jumper T12, T16, and T18 series remote controllers - basically plug and play. The heat sink has been specially customized for the transmitter module, which can help the transmitter to operate stably under high-power conditions.