This Slim Pro TX module is designed by Happymodel and based on the open source- ExpressLRS which is a very popular low latency and high packet rate RF module for RC Airplane and FPV Racing drone. Its main hardware architecture is ESP32, ESP8285 and SX1280 RF chip. The ES24TX Slim Pro module is a complete solution which is already pre-load the Expresslrs firmware and it’s plug and play for Frsky X-lite/X-lite pro/X9 Lite , TBS Tango2.
This Slim Pro module comes with an aluminum alloy shell and is equipped with a cooling fan that automatically works when the module is working at 250mw.
The slim pro TX module supports a maximum power output of about 1000mw, this would be very useful for Long Range FPV.

Features:
Supports up to 1000mw RF power (T-lite radio and Tango2 radio need external power supply)
RGB LED ready
Cooling Fan ready
Open source ExpressLRS
Long range, low latency and High re-flashed Rates
Telemetry data transmission supported
CNC aluminum protective shell

Specifications:
Regulatory Domain: ISM2400
MCU: ESP32(main),ESP8285(as ESP backpack)
RF chip: SX1280IMLTRT
Frsky Lite 8pin socket
Frequency Range: 2400 MHz to 2500 MHz
Maximum receive refresh rate: 500Hz
Minimum receiver refresh rate: 25Hz
RF Output Power: ≤30dBm
Power supply voltage: 5v~12v
Weight: 50gram (without antenna）
Dimension: 67.5mm*30mm*20.5mm (without antenna)
Antenna gain: 1.87dBi
Firmware target: HappyModel_ES24TX_Pro_Series_2400_TX

Package include:
ES24TX Slim Pro TX module *1
Happymodel Moxon 2.4GHz antenna *1

You can update firmware by ExpressLRS configurator or update the firmware via connect the Wifi hot spot of the “ExpressLRS TX Module”, visit “10.0.0.1” by browser (password:expresslrs)