RadioMaster ER3 PRO Dual-Band Receiver

Introduction

The RadioMaster ER3 PRO is an advanced, compact ExpressLRS receiver engineered for FPV drones and vehicles where installation space is limited, but reliable control, telemetry, and connectivity are paramount. Its innovative dual-band GEMINI-X RF system operates concurrently on both 2.4 GHz and 900 MHz Sub-G frequencies, providing a highly robust control link and up to 100 mW of telemetry power. This makes it an exceptional choice for pilots seeking maximum performance and data feedback from their systems.

Key Advantages

• ExpressLRS Performance: Delivers low latency, high reliability, and excellent link quality with flexible configuration options.
• Dual-Band Gemini X (2.4 GHz + Sub-G 900 MHz): Utilizes both frequency bands simultaneously for enhanced link reliability across various operating conditions.
• High-Power Telemetry: Features up to 100 mW telemetry output for improved data reliability and extended range.
• Versatile Outputs: Offers 3 PWM outputs plus serial support for CRSF and SBUS, catering to diverse setup needs.
• Independent Voltage Telemetry: Monitors up to two power sources independently via dedicated ADC channels (EXT-V up to 70V, V-PWM up to 12V).
• Wi-Fi & WebUI Updates: Allows for convenient configuration and firmware updates directly, without requiring disassembly.
• Durable Construction: Encased in a compact, injection-molded, protective housing for long-lasting reliability in demanding environments.
• MMCX Antenna Connectors: Provides durable, replaceable antennas with secure connections.

Technical Specifications

• Product: ER3 PRO PWM Dual-Band GEMINI and GEMINI-X Receiver
• Input Voltage: DC 5.0 - 12.0 V
• Wireless Protocol: ExpressLRS
• Output Channels: 3CH PWM
• Serial Output: CRSF / SBUS
• Telemetry Power: Up to 100 mW (adjustable via LUA)
• Voltage Detection Range (EXT-V): DC 4.0 - 70 V
• Bus Interface: CRSF
• Antenna: 25 cm, high sensitivity, MMCX connector
• Weight: 13.5 g (without antenna)
• Dimensions: 49.2 x 26.8 x 13.0 mm
• Firmware Target: RadioMaster Dual 2.4GHz/900MHz Receiver
• Device Name: ER3Pro Dual Band True Diversity + 3xPWM RX
• ELRS FW Version: Requires 4.1.0 or newer

Applications

The RadioMaster ER3 PRO is perfectly suited for a wide range of FPV applications, including compact racing drones, freestyle quads, and UAV systems where space is at a premium. Its robust dual-band operation and high-reliability features make it ideal for long-range flights, complex builds, and any scenario requiring dependable control and telemetry data. It's an excellent upgrade for pilots looking to enhance their model's performance and connectivity.

Compatibility

This receiver is compatible with all ExpressLRS transmitters and modules, including those with built-in ELRS capabilities. It supports CRSF and SBUS serial protocols for integration with various flight controllers. The voltage detection feature allows for monitoring of dual power sources, enhancing system diagnostics.

FAQ

What makes the RadioMaster ER3 PRO receiver ideal for compact FPV builds?

The ER3 PRO is designed with limited installation space in mind, offering powerful dual-band ExpressLRS functionality (2.4 GHz and 900 MHz) in a small, lightweight package. Its compact dimensions and robust feature set ensure reliable performance without compromising space.

Can the RadioMaster ER3 PRO receiver monitor battery voltage?

Yes, the ER3 PRO features independent voltage telemetry for two sources. It can monitor the receiver's supply voltage (V-PWM up to 12V) and an external source (EXT-V up to 70V), providing crucial data for flight management.

What wireless protocols does the RadioMaster ER3 PRO support?

The receiver utilizes the ExpressLRS protocol for its wireless communication, known for its low latency and high reliability. It supports both 2.4 GHz and 900 MHz Sub-G bands through its GEMINI-X system.

Where can I buy the RadioMaster ER3 PRO receiver with fast delivery?

You can buy the RadioMaster ER3 PRO receiver at HTDRONE, your specialized FPV and UAV drone parts store based in Poland. We offer fast shipping within Poland and reliable international delivery via DHL worldwide. Order yours today!

Is the RadioMaster ER3 PRO compatible with all ExpressLRS transmitters?

Yes, the ER3 PRO is fully compatible with all ExpressLRS transmitters and modules, including those integrated into radio controllers. It requires ExpressLRS firmware version 4.1.0 or newer for optimal performance.