XR3 Nano Multi-Frequency Antenna Diversity ExpressLRS Receiver
XR3 Nano Multi-Frequency Antenna Diversity ExpressLRS Receiver
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The XR3 Receiver is a versatile, ultra-compact ExpressLRS receiver measuring just 20 × 15 mm. Powered by the third-generation Semtech LR1121 transceiver, the XR3 operates on either the 2.4 GHz or Sub-G 900 MHz bands. Whether using 2.4 GHz or 900 MHz, the XR3 delivers strong range and sensitivity in a small, lightweight package—well suited for a wide range of builds. With the reliability of ExpressLRS, you can focus on operation without worrying about link quality.
Designed for convenience, the XR3 features built-in Wi-Fi for effortless configuration and firmware updates. Access and manage settings through an intuitive WebUI on your PC or mobile device with ease.
Features
- Antenna diversity for improved signal stability and extended range
- Supports ExpressLRS 2.4GHz or Sub-G 900MHz
- Powered by a high-performance ESP32-C3 MCU
- Features the Semtech LR1121 transceiver
- Includes an additional UART port for expanded connectivity
- Secondary port for advanced functionality and future expansion
- Castellated pads for easy soldering and flexible installation
Specification
| Parameter | Details |
|---|---|
| Item | XR3 Nano Multi-Frequency Antenna Diversity ExpressLRS Receiver |
| Type | ISM 2.4 or CE868 |
| MCU | ESP32-C3 |
| RF Chip | LR1121 |
| RF Connector | IPEX-1 x 2 |
| Antenna | 2x T-Antenna (2.4GHz, 900MHz, or Dual-Band depending on selected package) |
| Frequency Range | 2.4GHz / Sub-G 900MHz |
| Telemetry Power | 100mW |
| Maximum Refresh Rate | DK500Hz / K1000Hz |
| Minimum Refresh Rate | 25Hz |
| Working Voltage | DC 4.5 – 8.4V |
| Weight | 1.3g (without antenna) |
| Dimensions | 22 × 15 × 4mm |
| 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 |
Antenna Diversity
The XR3 receiver features a Skyworks RFX2401C providing an LNA for improved receiver performance, a PA providing up to 100mW of telemetry performance and antenna switching for antenna diversity.
Flexible Frequency Options
The XR3 Receiver gives you the freedom to choose the frequency configuration that best suits your setup. It is available with 2.4GHz, Sub-G 900MHz, or Dual-Band antenna options.
The Dual-Band configuration supports both 2.4GHz and 900MHz, allowing you to switch between frequency bands without replacing the antenna.
Need to change your setup later? Optional replacement antennas are available for each configuration, making it easy to adapt the XR3 to different frequency requirements without purchasing a new receiver.
Package Includes
- 1 * XR3 Nano Multi-Frequency Antenna Diversity ExpressLRS Receiver
- 2 * T Antenna (Either 2.4GHz, 900MHz or Dual-Band depending on selected package)
- 1 * CRSF Wire
- 3 * Heat-Shrinkable Tube
- 1 * Manual Card
