RadioMaster XR4 Gemini Xrossband Dual-Band ExpressLRS Receiver - Ultimate FPV Connection

Introduction

The RadioMaster XR4 Gemini Xrossband Dual-Band Receiver represents a leap forward in FPV drone connectivity. Designed for pilots who refuse to compromise on signal integrity, this cutting-edge receiver utilizes dual LR1121 RF transceivers and the advanced ExpressLRS Gemini Xrossband (Gem-X) protocol. It seamlessly operates across both 2.4 GHz and Sub-G 868/915 MHz frequencies, delivering an unparalleled stable and robust RF link, essential for critical flight operations, long-range exploration, and intense racing scenarios.

Key Advantages

• True Diversity and Dual-Band Operation: Experience superior signal reception with two independent RF circuits, supporting both 2.4 GHz and Sub-G frequencies simultaneously or independently.
• ExpressLRS Gemini Xrossband (Gem-X): Benefit from the latest advancements in the ExpressLRS protocol for unmatched reliability and performance.
• Ultra-Low Latency & High Refresh Rate: Achieve lightning-fast response times with a maximum refresh rate of up to 1000 Hz, crucial for precision control.
• Integrated Wi-Fi Connectivity: Effortlessly update firmware and configure settings via the user-friendly WebUI accessible from your PC or mobile device.
• Compact and Lightweight Design: Weighing only 1.7g, its small dimensions (22 x 18 x 4 mm) make it ideal for a wide range of FPV drones and fixed-wing aircraft without adding unnecessary bulk.
• Enhanced Signal Stability: Dual T-type antennas ensure excellent reception sensitivity and connection stability, even in challenging environments.
• Versatile Operating Modes: Switch between single-frequency Gemini mode and dual-band Xrossband mode to adapt to your specific flight needs.
• Robust Construction: Built for demanding conditions, the XR4 provides the most secure and solid RF connection available.

Technical Specifications

• Product: XR4 Gemini Xrossband Dual-Band Receiver
• Microcontroller: ESP32D4
• RF Chip: LR1121 x 2
• RF Connector: IPEX-1 x 2
• Antenna: 2x Dual-band T-type antennas (included)
• Frequency Range: 2.4 GHz / Sub-G 868/915 MHz
• Telemetry Power: 100 mW
• Max Receiver Refresh Rate: DK500 Hz / K1000 Hz
• Min Receiver Refresh Rate: 50 Hz
• Operating Voltage: DC 4.5 - 8.4 V
• Weight: 1.7 g (without antenna)
• Dimensions: 22 x 18 x 4 mm
• Firmware Version: ExpressLRS v3.5.1 pre-installed
• FW Target: RadioMaster XR4 2.4/868/915 Gemini RX
• Bus Interface 1: CRSF
• Bus Interface 2: UART

Applications

The RadioMaster XR4 Gemini Xrossband Dual-Band Receiver is exceptionally suited for a variety of FPV applications, including high-speed racing, freestyle acrobatics, long-range exploration, cinematic FPV, and UAV operations. Its reliability makes it a top choice for critical missions where signal loss is not an option.

Compatibility

Compatible with ExpressLRS 2.4 GHz, Sub-G 868/915 MHz, Gemini, and Gemini Xrossband (Gem-X) systems. Features CRSF and UART bus interfaces for broad integration. Operates on DC 4.5 - 8.4 V. Includes two dual-band T-type antennas.

FAQ

What makes the RadioMaster XR4 Gemini Xrossband receiver stand out?

The RadioMaster XR4 stands out with its true diversity and dual-band capabilities, operating on both 2.4 GHz and Sub-G 868/915 MHz frequencies using the advanced ExpressLRS Gemini Xrossband (Gem-X) protocol for exceptional signal stability and reliability.

What is the maximum refresh rate of the RadioMaster XR4 receiver?

The RadioMaster XR4 receiver offers a maximum refresh rate of up to 1000 Hz (K1000 Hz), ensuring incredibly responsive control essential for high-performance FPV flying and racing.

Can I easily update the firmware on the RadioMaster XR4?

Yes, the RadioMaster XR4 features integrated Wi-Fi, allowing for simple firmware updates and configuration through a user-friendly WebUI accessible from your PC or mobile device.

What types of FPV drones is the RadioMaster XR4 receiver suitable for?

Its compact size and lightweight design make the RadioMaster XR4 ideal for a wide range of FPV applications, including racing drones, freestyle quads, fixed-wing FPV models, and long-range exploration craft.

Where can I buy the RadioMaster XR4 Gemini Xrossband receiver with fast delivery?

You can buy the RadioMaster XR4 Gemini Xrossband receiver at HTDRONE, your specialized FPV parts store. We offer fast delivery within Poland and reliable shipping worldwide via DHL.