{"product_id":"xr4-gemini-xrossband-dual-band-expresslrs-receiver-eu-lbt","title":"XR4 Gemini Xrossband Dual-Band ExpressLRS Receiver EU-LBT","description":"\u003cp\u003eThe XR4 is a true diversity ExpressLRS receiver with two Semtech LR1121 transceivers. It covers 2.4 GHz and Sub-GHz 900 MHz and runs Gemini single-frequency or Xrossband dual-band mode on the same board.\u003c\/p\u003e\n\u003cp\u003eBuilt-in WiFi with a web UI lets you configure the receiver and update firmware from a PC or phone. A secondary UART port and castellated pads cover extended builds.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eModes and antenna mapping:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eGemini 2.4 GHz: antenna 1 and antenna 2 on 2.4 GHz\u003c\/li\u003e\n\u003cli\u003eGemini Sub-GHz: antenna 1 and antenna 2 on 868\/915 MHz\u003c\/li\u003e\n\u003cli\u003eGemini Xrossband (Gem-X): antenna 1 on 868\/915 MHz, antenna 2 on 2.4 GHz\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTrue diversity with two Semtech LR1121 transceivers\u003c\/li\u003e\n\u003cli\u003e2.4 GHz, Sub-GHz 900 MHz, Gemini and Xrossband (Gem-X) support\u003c\/li\u003e\n\u003cli\u003eSwitchable between Gemini single-frequency and Xrossband dual-band mode\u003c\/li\u003e\n\u003cli\u003e100 mW telemetry RF power\u003c\/li\u003e\n\u003cli\u003eSecondary UART port\u003c\/li\u003e\n\u003cli\u003eCastellated pads for soldering\u003c\/li\u003e\n\u003cli\u003eCompatible with ExpressLRS transmitters and modules on the matching band\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eItem: XR4 Gemini Xrossband Dual-Band Receiver\u003c\/li\u003e\n\u003cli\u003eMCU: ESP32D4\u003c\/li\u003e\n\u003cli\u003eRF chip: Semtech LR1121 x 2\u003c\/li\u003e\n\u003cli\u003eRF connector: IPEX-1 x 2\u003c\/li\u003e\n\u003cli\u003eAntenna: Dual-band T antenna x 2\u003c\/li\u003e\n\u003cli\u003eFrequency range: 2.4 GHz \/ Sub-GHz 900 MHz\u003c\/li\u003e\n\u003cli\u003eTelemetry power: 100 mW\u003c\/li\u003e\n\u003cli\u003eMaximum packet rate: DK500Hz \/ K1000Hz\u003c\/li\u003e\n\u003cli\u003eMinimum packet rate: 50 Hz\u003c\/li\u003e\n\u003cli\u003eWorking voltage: DC 4.5 to 8.4 V\u003c\/li\u003e\n\u003cli\u003eWeight: 1.7 g (without antenna)\u003c\/li\u003e\n\u003cli\u003eDimensions: 22 x 18 x 4 mm\u003c\/li\u003e\n\u003cli\u003eFirmware: ExpressLRS v3.5.1 pre-installed\u003c\/li\u003e\n\u003cli\u003eFW target: RadioMaster XR4 2.4\/900 Gemini RX\u003c\/li\u003e\n\u003cli\u003eBus interface: CRSF\u003c\/li\u003e\n\u003cli\u003eExtend interface: UART\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eIncludes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e1x XR4 Gemini Xrossband Dual-Band ExpressLRS receiver\u003c\/li\u003e\n\u003cli\u003e2x dual-band T antenna\u003c\/li\u003e\n\u003cli\u003e1x CRSF wire\u003c\/li\u003e\n\u003cli\u003e3x heat-shrink tube\u003c\/li\u003e\n\u003cli\u003e1x manual card\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Radiomaster","offers":[{"title":"Default Title","offer_id":55593941598545,"sku":"HP0157.XR4-LBT","price":44.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/3521\/1345\/files\/Radiomaster-XR4-1.jpg?v=1793619073","url":"https:\/\/itsfpv.de\/en-int\/products\/xr4-gemini-xrossband-dual-band-expresslrs-receiver-eu-lbt","provider":"it's FPV","version":"1.0","type":"link"}