How to activate Gem-X dual-band mode on XR4?

In ExpressLRS WebUI: Enable "Dual-Band Sync" in TX/RX Settings. Requires LR1121-compatible dual-band antenna. Auto-switches between 2.4G (interference) and 900MHz (range) with zero manual input.

Can RadioMaster XR3 output telemetry to flight controllers?

Yes. Connect its "T" pin to FC's RX port via CRSF protocol. Set 500Hz refresh rate in WebUI for ≤5ms latency telemetry streaming (battery/RSSI/GPS data).

Why must RadioMaster XR2 use 900MHz-only antennas?

XR2's PCB lacks 2.4GHz impedance matching circuits. 2.4GHz antennas cause SWR >2.0 (dangerous RF reflection), risking chip burnout. Use genuine 915MHz whip antennas.

Max range with Ranger TX + XR1 at 100mW?

7.3km (open area) / 1.2km (dense urban). Enable "Dynamic Power" to boost output to 250mW temporarily when RSSI <-108dBm. Requires heatsink on TX.

Is soldering needed for micro drone installation?

No. Plug directly into AIO FC's ExpressLRS port (compatible with Nano-2/Whoop Lite connectors). 3-pin socket locks prevent disconnection during crashes.

radiomaster xr2 nano 2.4ghz expresslrs receiver

RadioMaster XR2 Nano 2.4GHz ExpressLRS Receiver

Q: Is soldering needed for micro drone installation?

No. Plug directly into AIO FC's ExpressLRS port (compatible with Nano-2/Whoop Lite connectors). 3-pin socket locks prevent disconnection during crashes.

About RadioMaster XR2 Nano 2.4GHz ExpressLRS Receiver:

The Radiomaster XR2 Receiver is a nano-sized powerhouse engineered for 2.4GHz ExpressLRS, featuring an integrated tower antenna that delivers exceptional reception within its ultra-compact design. With a footprint of just 16x12mm and a weight of only 0.8g, Radiomaster RX2 fits seamlessly into even the most space-constrained builds. Driven by the advanced Semtech LR1121 transceiver (third generation), the Radiomaster XR2 offers compatibility with all ELRS 2.4GHz transmitters and unlocks the benefits of DK500Hz mode for LR1121-based systems, ensuring unparalleled reliability and responsiveness. The built-in Wi-Fi module simplifies firmware updates and configuration via a WebUI on your PC or mobile device. With ultra-low latency and high refresh rates, the XR2 stands out in Whoops, micro drones, and fixed-wing models, where every gram and millimeter counts for peak performance.

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Reviews (2)

A**************t

Gift for son's 16th bday. Paired with his ZORRO controller flawlessly. The WiFi binding guide (QR code→phone) made setup idiot-proof. Worth every euro for his FPV journey!
Type：2.4GHz tower antenna
D**************

XR1's 900MHz coverage saves crops! Flew 5.7km over vineyards with 0 failsafes. WebUI let me tweak power/frequency from iPad in-field. Reliability: 10/10.
Type：2.4GHz tower antenna

RadioMaster XR2 Nano 2.4GHz ExpressLRS Receiver

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