RadioMaster XR1 Nano Multi-Frequency ExpressLRS ELRS Receiver 2.4GHz / 900MHz Long Range FPV Drone RX

The RadioMaster XR1 Nano Multi-Frequency ExpressLRS Receiver represents a major technological leap for FPV long-range pilots and micro-drone builders. Built on the cutting-edge third-generation Semtech LR1121 RF transceiver architecture, the XR1 breaks traditional single-band limits. Instead of locking you into one frequency ecosystem, this modular multi-frequency platform operates across the 2.4GHz ISM band or Sub-GHz (900MHz/868MHz) long-range bands using the exact same hardware core, depending on your transmitter module and antenna. Powered by a high-efficiency ESP32C3 MCU, it pushes extreme packet rates up to 1000Hz while packing a massive 100mW telemetry engine into a tiny footprint weighing just 1 gram.

Why Multi-Frequency Architecture Rules Modern FPV Long Range

Choosing between 2.4GHz and 900MHz has historically been a permanent commitment during a drone build:

• 2.4GHz Networks: Deliver blazing-fast packet rates up to 1000Hz for razor-sharp micro-step adjustments, making them perfect for FPV track racing, park freestyle, and high-density environments. However, their shorter wavelengths have reduced penetration through dense obstacles.

• 900MHz/868MHz Networks: Exploit longer wave physics to yield extreme penetration through obstacles and superior diffraction characteristics over mountain peaks and long valleys.

The RadioMaster XR1 Nano leverages the Semtech LR1121 transceiver to natively support both bands. When paired with a specialized Dual-Band T-Antenna, you gain the unique ability to dynamically pivot between 2.4GHz low-latency track racing and 900MHz deep-range mountain diving without purchasing or re-soldering a brand-new receiver chip.

Technical Specifications

Key Hardware Features & Innovation Highlights

• Integrated 100mW Telemetry Engine: Unlike standard micro receivers that choke out telemetry link alerts at a short distance, the XR1 blasts out 100mW of real-time sensor feedback data. Keep constant tabs on your Link Quality (LQ), RSSI dBm values, and battery voltage over incredible distances.

• Secondary Peripheral UART: Features an additional on-board hardware UART mapping line. This enables advanced integration workflows, allowing peripheral hardware expansion or custom passthrough communication options directly through your RX module.

• Castellated PCB Edge Pads: The physical structural board eliminates fragile through-holes by using castellated edge solder pads. Wires lay perfectly flat against the edge, protecting the solder joints from tearing off the board during high-G impact events.

• Built-in Wi-Fi WebUI Setup: Built-in wireless antennas let the receiver deploy a standalone Wi-Fi hotspot upon powering up. Flash the latest ExpressLRS v3.x firmware, load custom binding phrases, or adjust system options instantly using any smartphone or PC web browser.