Happymodel ExpressLRS ES900TX Max 2W 915MHz External Micro Module

Introducing the compact and powerful Happymodel ES900TX Max 2W external micro module for FPV transmitters, operating at 915 MHz and providing a maximum output power of up to 2W (over 33dBm). This module combines a modern hardware platform based on ESP32 + ESP8285 microcontrollers, convenient power options, and simple firmware updates via Wi-Fi, making it an excellent choice for FPV enthusiasts who need reliable long-range communication.

Description and Key Advantages

The module features a wide VCC 5–13V input power range, allowing connection of standard lithium-polymer batteries. An XT30 connector is provided for external power, and a standard SMA connector for antenna connection. Weighing only 60g and with compact dimensions of 72mm x 48.5mm x 32mm (without antenna), the module is easy to install on transmitters and does not add unnecessary bulk when carried. An integrated RGB LED indicates device status, and active cooling in the form of a fan ensures stable operation under increased loads.

Compatibility and Application

The module is designed for installation in equipment with a JR micro-module bay. Compatible transmitters include: RadioMaster TX12 MKII, RadioMaster Boxer, RadioMaster TX16s, Jumper TX14, and other remotes that support the ExpressLRS series. This is an ideal solution for long-distance flights where increased power and stable radio communication are required. Wi-Fi firmware update support simplifies the update and configuration process, and the Happymodel_ES900_MAX firmware target is planned for ExpressLRS v3.4.

Technical Specifications

• Radio Frequency: 915 MHz
• Maximum Output Power: >33 dBm (2W)
• Microcontroller: ESP32 + ESP8285
• VCC Input: 5-13V (external battery recommended)
• Firmware Target: Happymodel_ES900_MAX (will be available in ExpressLRS v3.4)
• Firmware Update: via Wi-Fi
• External Power Connector: XT30
• RGB LED: Yes
• Fan: Yes
• Antenna Connector: SMA
• Size: 72mm x 48.5mm x 32mm (without antennas)
• Weight: 60g

Package Contents

• 1 x Happymodel ExpressLRS ES900TX Max 2W module
• 1 x T-shaped antenna

Brand: Happymodel

Product Category: Drones & Quadcopters > Drone Components > Drone Accessories

The Happymodel ES900TX Max 2W is a balanced solution for FPV pilots who need a powerful external transmitter with easy connectivity and firmware updates. Thanks to its thoughtful design, active cooling, status indication, and universal connectors, this module easily integrates into your equipment and provides long-lasting and stable communication.

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