{"product_id":"radiomaster-xr4-gemini-xrossband-dual-band-receiver-true-diversity-low-latency","title":"Radiomaster XR4 Gemini Xrossband Dual-Band Receiver | True Diversity \u0026 Low-Latency","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eThe Radiomaster XR4 Gemini Xrossband Dual-Band Receiver is a compact, true diversity module designed to maximize reliability across 2.4 GHz and Sub-G 900 MHz bands. Built around dual LR1121 transceivers, it supports the advanced ExpressLRS Gemini Xrossband protocol (Gem-X), delivering flexible operation and robust connectivity for demanding flying environments.\u003c\/p\u003e\n\u003ch3\u003eWhat makes it stand out\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eDual independent RF circuits provide improved reception, reducing dropouts in challenging airspace.\u003c\/li\u003e\n  \u003cli\u003eVersatile operation modes let you switch between Gemini single-frequency or Xrossband dual-band to match the mission.\u003c\/li\u003e\n  \u003cli\u003eIntegrated Wi-Fi module enables firmware updates and configuration via a WebUI from PC or mobile devices.\u003c\/li\u003e\n  \u003cli\u003eUltra-low latency and high refresh rates help maintain a responsive control link in real time.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eReal world use cases\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eIdeal for lightweight drones and fixed-wing platforms needing a reliable RF link.\u003c\/li\u003e\n  \u003cli\u003eBeneficial in environments with interference or longer-range flying where signal stability matters.\u003c\/li\u003e\n  \u003cli\u003eQuick on-the-field tuning and updates thanks to the WebUI and easy-to-solder design.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003ePerformance and specs at a glance\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eSupports 2.4 GHz and Sub-G 900 MHz bands with dual LR1121 transceivers.\u003c\/li\u003e\n  \u003cli\u003eTelemetry power up to 100 mW and high refresh rate options for responsive control.\u003c\/li\u003e\n  \u003cli\u003eCompact dimensions (22 mm x 18 mm x 4 mm) and light weight (about 1.7 g, antenna excluded).\u003c\/li\u003e\n  \u003cli\u003ePre-installed ExpressLRS v3.5.1 firmware; CRSF and UART interfaces for telemetry and control.\u003c\/li\u003e\n  \u003cli\u003eIncludes two dual-band T antennas, CRSF wire, heat shrink tubing, and a manual card.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe XR4 is designed to be easy to mount and ready for tuning, offering a robust RF link when every signal matters. The combination of flexible band support, fast updates via WebUI, and compact form factor makes it a practical choice for pilots seeking reliable performance without compromising on weight or complexity.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What bands does the XR4 support and how does true diversity improve reliability?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It supports 2.4 GHz and Sub-G 900 MHz, with dual LR1121 transceivers for a more stable link.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is setup quick, and can I update firmware easily?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. ExpressLRS v3.5.1 is pre-installed and a WebUI via Wi-Fi makes updates straightforward.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"RADIOMASTER","offers":[{"title":"Default Title","offer_id":46525978902727,"sku":"B0F1TKDMGS","price":56.41,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0780\/2355\/7319\/files\/radiomaster-xr4-gemini-xrossband-receiver.jpg?v=1778403041","url":"https:\/\/toyterrax.com\/products\/radiomaster-xr4-gemini-xrossband-dual-band-receiver-true-diversity-low-latency","provider":"ToyTerrax","version":"1.0","type":"link"}