The Radiomaster XR series ExpressLRS receivers bring an exciting upgrade to FPV drones, offering a range of options to suit every pilot’s needs—from micro drones to long-range setups—and include advanced features like dual-band capability, Gemini Xrossband, and ultra-low latency. Paired with Radiomaster’s GX12 transmitter or Nomad module, these receivers deliver unmatched reliability and flexibility for FPV pilots in 2025. In this review, I’ll break down the features, functionality, and differences among the XR1, XR2, XR3, and XR4 receivers, helping you determine which one suits your setup best.
Learn more about ExpressLRS in my beginner’s guide: https://oscarliang.com/setup-expresslrs-2-4ghz/
Table of Contents
Where to Buy
Get the XR1 series receivers ($11.99 for the dual-band version or $9.99 for the single-band version):
- Radiomaster: https://oscarliang.com/product-1ghc
- AliExpress: https://s.click.aliexpress.com/e/_omWnpld
Get the XR2 receiver ($9.99):
- Radiomaster: https://oscarliang.com/product-dc76
- AliExpress: https://s.click.aliexpress.com/e/_onHnqxz
Get the XR3 receiver ($14.99):
- Radiomaster: https://oscarliang.com/product-zeaj
- AliExpress: https://s.click.aliexpress.com/e/_ooFfDBZ
Get the XR4 receiver ($19.99):
- Radiomaster: https://oscarliang.com/product-l0bz
- AliExpress: https://s.click.aliexpress.com/e/_oFf6lz5
Dual-band antennas are available separately for $3.49, allowing users to customize their setups: https://oscarliang.com/product-k59o
The Dual-band antenna is able to receive and transmit both 2.4GHz and 900MHz signals (through one single IPEX-1 connector).
New LR1121 Chipset
Radiomaster has built this new receiver lineup on the LR1121 chipset, known for its dual-band capability and advanced ExpressLRS features. This chipset allows seamless switching between 2.4GHz and 868/915MHz bands without the need for separate hardware. It’s a significant leap from older chipsets, which were restricted to a single frequency band. The XR4’s Gemini X mode takes this a step further, transmitting and receiving on both bands simultaneously.
Specifications
XR1 Specs
- Frequency: 900 MHz and 2.4 GHz.
- Antenna Connector: IPEX-1
- Antenna Options:
- Single-band (2.4GHz or 900MHz).
- Dual-band antenna (supports both 900MHz and 2.4GHz).
- Maximum Packet Rate:
- DK 500 Hz (900 MHz).
- K 1000 Hz (2.4 GHz).
- Minimum Packet rate: 50Hz
- Telemetry Power: 100mW.
- Weight: Slightly larger than XR2.
- Dimensions: 20mm x 13mm x 3mm.
- Power Input: 5V DC.
- Firmware Version: ExpressLRS v3.5.1 pre-installed
- FW Target: RadioMaster XR1 2.4/900 RX
- Bus interface 1: CRSF
- Bus interface 2: UART
- MCU: ESP32C3
- RF chip: Semtech LR1121
- Dimension: 20mm * 13mm * 3mm
- Weight: 1.0g (without antenna)
XR2 Specs
- Frequency: 2.4GHz only
- Antenna: Built-in ceramic tower antenna.
- Maximum Packet Rate: DK 500Hz.
- Minimum Packet rate: 50Hz
- Telemetry Power: 10 mW.
- Weight: 0.8g.
- Dimensions: 16mm x 12mm x 6mm.
- Power Input: 5V DC.
- Firmware Version: ExpressLRS v3.5.1 pre-installed
- FW Target: RadioMaster XR2 2.4 RX
- Bus interface 1: CRSF
- Bus interface 2: UART
- MCU: ESP32C3
- RF Chip: Semtech LR1121
- Dimension: 16mm * 12mm * 6mm
- Weight: 0.8g
XR3 Specs
- Frequency: Dual-band (900 MHz and 2.4 GHz).
- Antenna connectors: Two IPEX-1
- Antenna Options: Two external antennas for diversity (single-band or dual-band options available).
- Maximum Packet Rate:
- DK 500Hz (900 MHz).
- K 1000Hz (2.4 GHz).
- Minimum Packet rate: 25Hz
- Telemetry Power: 100mW.
- Weight: Slightly larger than XR1.
- Dimensions: Similar to XR1 but includes diversity components.
- Voltage Input: 5V to 12.6V DC.
- Firmware Version: ExpressLRS v3.5.1 pre-installed
- FW Target: RadioMaster XR3 2.4/900 Diversity RX
- Bus interface 1: CRSF
- Bus interface 2: UART
- MCU: ESP32C3
- RF Chip: LR1121
- Dimension: 22mm * 15mm * 4mm
- Weight: 1.3g (without antenna)
XR4 Specs
- Frequency: Dual-band with simultaneous operation (900 MHz and 2.4 GHz).
- Antenna: Two dual-band antennas (included)
- RF connector: Two IPEX-1
- Max Packet Rate:
- DK 500Hz (900 MHz).
- K 1000Hz (2.4 GHz).
- Minimum receiver rate: 50Hz
- Telemetry Power: 100mW.
- Weight: Compact design compared to previous Gemini receivers.
- Dimensions: Slightly larger than XR1 but smaller than previous Gemini-capable models.
- Voltage Input: 5V to 12.6V DC.
- UART: 1 main UART, additional UART available.
- Gemini Xrossband Capability: Yes – supports simultaneous transmission on 900 MHz and 2.4 GHz.
- Firmware Version: ExpressLRS v3.5.1 pre-installed
- FW Target: RadioMaster XR4 2.4/900 Gemini RX
- Bus interface 1: CRSF
- Bus interface 2: UART
- MCU: ESP32D4
- RF Chip: Two LR1121
- Dimension: 22mm * 18mm * 4mm
- Weight: 1.7g (without antenna)
Comparison
| Receiver | Notable Features | Telemetry Power | Dimensions (mm) | Weight (g) | Price ($) |
| XR1 | Dual-band capable. Single-band or dual-band antenna options available. Supports a single antenna only. | 100mW | 20x13x3 | 1.0 | 11.99 |
| XR2 | Built-in compact tower antenna, limited to 2.4GHz only. Compact and lightweight design. | 10mW | 16x12x6 | 0.8 | 9.99 |
| XR3 | Dual antenna setup for diversity. Available in single-band or dual-band antenna options. | 100mW | 22x15x4 | 1.3 | 14.99 |
| XR4 | True dual-band capability with Gemini-X functionality. Dual LR1121 chipsets for independent 2.4GHz and 900MHz operation. | 100mW | 22x18x4 | 1.7 | 19.99 |
Applications
XR1 – Versatile with External Antenna
- Freestyle and Racing Quads: Works well for typical 5-inch FPV quads, offering good range and reliability with optional dual-band capability.
- Mid- and Long-Range FPV: Ideal for pilots who occasionally switch between 2.4 GHz and 900 MHz frequencies for varying environments. It’s also suitable for mid to long-range flights, offering reliable performance.
XR2 – Compact and Lightweight
- Tiny Whoops and Micro Drones: Perfect for ultralight builds where every gram matters.
- Indoor FPV Flying: Well-suited for environments where the smaller 2.4 GHz frequency provides sufficient range and penetration.
- Beginner-Friendly Builds: Compact size and hassle-free antenna mounting make it ideal for newcomers who want to avoid the complexities of dual-band setups.
- Small Fixed-Wing Models: Excellent for lightweight and compact fixed-wing drones where size and weight are critical.
XR3 – Dual-Band Diversity
- Improved Signal Stability: Dual antennas reduce the likelihood of signal loss during flight, ensuring one antenna always maintains a line of sight connection with the transmitter when the antennas are mounted properly.
- Applications:
- Larger fixed-wing aircraft and FPV drones such as 7-inch, 8-inch and 10-inch.
- Builds prioritizing reliability and range.
XR4 – Flagship Gemini Xrossband Receiver
The Gemini Xrossband feature, exclusive to the XR4, is a game-changer for FPV reliability. By using both 900MHz and 2.4GHz simultaneously, you get enhanced redundancy, reducing the risk of signal loss. To fully utilize this feature, pair the XR4 with the Radiomaster GX12 transmitter or Nomad module.
- Ultimate Long-Range Flying: Ideal for critical missions, providing maximum reliability and redundancy in RF-heavy environments or challenging terrains.
- Professional Pilots: Designed for advanced users who require uncompromised performance in demanding scenarios.
Compatibility
All XR series receivers (XR1, XR2, XR3, and XR4) are compatible with older ExpressLRS hardware, but some newer modes may not be available when using the new receivers with older modules.
Conclusion
Radiomaster has successfully expanded its product lineup with the XR series of receivers. Whether you’re a casual pilot or a professional, there’s an XR receiver tailored to your needs. The robust features, cutting-edge technology, and affordable pricing make the XR series a standout option in the ExpressLRS market. Whether you prioritize compact design, diversity, or full dual-band Gemini-X functionality, the XR series offers an impressive solution for every pilot.