RadioMaster XR3 Nano Multi-Frequency Antenna Diversity

The XR3 Receiver is an ultra - compact, versatile ExpressLRS receiver, just 20 x 15mm in size. Powered by the advanced third - generation Semtech LR1121 transceiver, it can operate smoothly on either 2.4GHz or Sub - G 900MHz bands. No matter which frequency you choose, the XR3 offers excellent range and sensitivity in a small, lightweight package, ideal for any build. With ExpressLRS reliability, you can focus on flying without link - quality concerns. It features built - in Wi - Fi for easy configuration and firmware updates. You can access and manage settings effortlessly through an intuitive WebUI on your PC or mobile device. Key features include antenna diversity for better signal stability and range, compatibility with ExpressLRS 2.4GHz or Sub - G 900MHz, an ESP32C3 high - performance MCU, a Semtech LR1121 transceiver, an additional UART port, a secondary port for advanced functionality, and castled pads for easy soldering. The XR3 comes in three configurations: 2.4GHz, Sub - G 900MHz, or a dual - band option that allows switching between frequencies without changing the antenna. All antenna types are available as optional accessories. Specifications: It has an ESP32C3 MCU, an LR1121 RF chip, IPEX - 1 X 2 RF connectors, 2x T - Antenna (frequency depends on the package), a frequency range of 2.4GHz / Sub - G 900MHz, 100mw telemetry power, a maximum receive refresh rate of DK500Hz / K1000Hz, a minimum receiver refresh rate of 25Hz, a working voltage of DC 5.0 - 12.6v, a weight of 1.3g (without antenna), dimensions of 22mm * 15mm * 4mm, pre - installed ExpressLRS v3.5.1 firmware, and CRSF and UART bus interfaces. The package includes 1x XR3 Nano receiver, 2x T Antenna, 1x CRSF Wire, 3x Heat - Shrinkable Tube, and 1x Manual Card.

Using the XR3 Receiver is easy. First, connect the receiver to your device according to the included manual. If you need to change settings or update the firmware, use the built - in Wi - Fi and access the WebUI on your PC or mobile device. When choosing an antenna, pick the one that suits your frequency needs. You can either go for 2.4GHz, Sub - G 900MHz, or the dual - band option. Remember, all antenna types are available as accessories, so you can switch frequencies later without buying a new receiver. When soldering, take advantage of the castled pads for an easier job. As for maintenance, keep the receiver in a dry and clean place. Avoid exposing it to extreme temperatures or moisture. If you notice any issues with signal stability, check the antenna connections. Also, make sure the working voltage is within the specified range of DC 5.0 - 12.6v to keep the receiver functioning properly.