RadioMaster XR4 Gemini Xrossband Dual-Band ExpressLRS Receiver
- Exact Model RadioMaster XR4 Gemini Xrossband Dual-Band ExpressLRS Receiver
- RF Architecture ExpressLRS Gemini / Gemini-X with dual LR1121 RF chains on 2.4GHz and Sub-G 900MHz
- MCU & Updates ESP32D4 with built-in Wi-Fi and WebUI configuration
- Performance Up to 1000Hz refresh rate and up to 100mW telemetry
- Antenna System Dedicated IPEX connectors for 2.4GHz and Sub-G antennas
- Size & Use Approx. 22×18×4mm, 1.7g without antennas; demanding FPV and long-range links
- Product Summary True-diversity Gemini-X receiver for simultaneous 2.4GHz and Sub-G 900MHz operation.
| Brand | Radiomaster |
|---|---|
| RF Architecture | ExpressLRS Gemini / Gemini-X with dual LR1121 RF chains on 2.4GHz and Sub-G 900MHz |
| MCU & Updates | ESP32D4 with built-in Wi-Fi and WebUI configuration |
| Performance | Up to 1000Hz refresh rate and up to 100mW telemetry |
| Antenna System | Dedicated IPEX connectors for 2.4GHz and Sub-G antennas |
| Size & Use | Approx. 22×18×4mm, 1.7g without antennas; demanding FPV and long-range links |
RADIOMASTER / PRODUCT SPOTLIGHT
RadioMaster XR4 Gemini Xrossband Dual-Band ExpressLRS Receiver
True-diversity Gemini-X receiver for simultaneous 2.4GHz and Sub-G 900MHz operation.
Product overview
RadioMaster XR4 Gemini Xrossband Dual-Band ExpressLRS Receiver is a radio receiver from Radiomaster. True-diversity Gemini-X receiver for simultaneous 2.4GHz and Sub-G 900MHz operation.
Verify this exact model and revision against the requirements of your aircraft or radio system; visually similar alternatives can have different hardware specifications.
Model-specific features
ExpressLRS Gemini / Gemini-X with dual LR1121 RF chains on 2.4GHz and Sub-G 900MHz
ESP32D4 with built-in Wi-Fi and WebUI configuration
Up to 1000Hz refresh rate and up to 100mW telemetry
Dedicated IPEX connectors for 2.4GHz and Sub-G antennas
Approx. 22×18×4mm, 1.7g without antennas; demanding FPV and long-range links
Technical specifications
| RF Architecture | ExpressLRS Gemini / Gemini-X with dual LR1121 RF chains on 2.4GHz and Sub-G 900MHz |
|---|---|
| MCU & Updates | ESP32D4 with built-in Wi-Fi and WebUI configuration |
| Performance | Up to 1000Hz refresh rate and up to 100mW telemetry |
| Antenna System | Dedicated IPEX connectors for 2.4GHz and Sub-G antennas |
| Size & Use | Approx. 22×18×4mm, 1.7g without antennas; demanding FPV and long-range links |
Radio-link compatibility
For a reliable control link, confirm ExpressLRS frequency band, supported transmitter module, receiver firmware, antenna type, supply voltage and output interface. PWM servo receivers and serial CRSF nano receivers serve different wiring requirements. Check region and binding settings before flight.
Do not substitute a similar-looking model without confirming its mechanical and electrical compatibility.
Choose the exact variant
The specifications above refer to RadioMaster XR4 Gemini Xrossband Dual-Band ExpressLRS Receiver. Compare rf architecture, mcu & updates, performance, antenna system with your existing hardware before ordering.
- Verify the model revision and product-specific connector or mount.
- Check compatibility with your flight controller, RF system or motor.
- Confirm pack contents and additional parts required for installation.
- Follow the manufacturer's instructions and test safely before flight.
Radiomaster
Explore the technology behind your next build.
Discover Radiomaster
RadioMaster designs radio-control hardware for hobby pilots and FPV builders, including transmitters, receiver modules and accessories built around modern control links. The range covers compact portable radios as well as feature-rich controllers with configurable switches, sticks and supported radio systems.
Radio selection is about ergonomics and the complete signal chain. ExpressLRS band, internal module version, receiver protocol, external module support and firmware configuration all affect compatibility. A well-matched radio offers comfortable control while leaving room to grow into a broader set of aircraft.
Before buying a RadioMaster transmitter or accessory, check the exact edition, region and radio protocol, plus the batteries or charging arrangement that specific model uses. Choosing the right receiver and updating firmware carefully are essential steps in a dependable setup.
Shipping Information
- Dubai Deliveries: Free one-day delivery within Dubai on business days, with an option for cash on delivery.
- UAE Deliveries: Delivery to other Emirates outside Dubai is available for a flat fee of AED 35, with an estimated delivery time of 2–3 business days. Please contact our team to check availability.
- International Deliveries: Shipping to GCC countries, the Middle East, and Africa is available upon prior arrangement with our support team due to varying import regulations. Customs, clearance fees, and taxes are the buyer's responsibility. For international shipping of additional accessories, all shipping costs, customs duties, and related fees will also be borne by the buyer.
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- Exact Model RadioMaster ER3 PRO PWM Dual-Band Gemini-X ExpressLRS Receiver
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