{"product_id":"radiomaster-dbr4-dual-band-xross-gemini-elrs-receiver","title":"RadioMaster DBR4 Dual Band Xross Gemini ExpressLRS Receiver","description":"\u003cdiv class=\"afd\"\u003e\n\u003cp\u003eThe RadioMaster DBR4 is a dual-band, dual-channel ExpressLRS Gemini receiver designed as the companion to the RadioMaster Nomad module. It has two dual-band sections, each able to receive 2.4GHz and 900MHz at the same time, and four separate wire antennas you can place for the best coverage – ideal for long-range and fixed-wing builds where every packet counts.\u003c\/p\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0900\/8562\/1794\/files\/af-8591525904418-01.gif\" alt=\"RadioMaster DBR4 Gemini Xrossband receiver\"\u003e\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul class=\"afk\"\u003e\n\u003cli\u003eTwo dual-band sections – 2.4GHz and 900MHz received simultaneously\u003c\/li\u003e\n\u003cli\u003eExpressLRS Gemini on 2.4GHz and 868\/900MHz, plus Gemini Xrossband (Gem-X)\u003c\/li\u003e\n\u003cli\u003eFour discrete antennas for flexible placement\u003c\/li\u003e\n\u003cli\u003eTwo Semtech LR1121 transceivers\u003c\/li\u003e\n\u003cli\u003eTelemetry power up to 100mW\u003c\/li\u003e\n\u003cli\u003e20 x 20mm mounting holes, vibration dampeners included\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0900\/8562\/1794\/files\/af-8591525904418-02.gif\" alt=\"DBR4 receiver\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0900\/8562\/1794\/files\/af-8591525904418-03.jpg\" alt=\"DBR4 receiver\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0900\/8562\/1794\/files\/af-8591525904418-04.gif\" alt=\"DBR4 receiver\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0900\/8562\/1794\/files\/af-8591525904418-05.jpg\" alt=\"DBR4 receiver\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0900\/8562\/1794\/files\/af-8591525904418-06.gif\" alt=\"DBR4 receiver\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0900\/8562\/1794\/files\/af-8591525904418-07.jpg\" alt=\"DBR4 receiver\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0900\/8562\/1794\/files\/af-8591525904418-08.jpg\" alt=\"DBR4 receiver\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0900\/8562\/1794\/files\/af-8591525904418-09.gif\" alt=\"DBR4 receiver\"\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eType\u003c\/th\u003e\n\u003ctd\u003eISM 2.4GHz, FCC 915MHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMCU\u003c\/th\u003e\n\u003ctd\u003eESP32\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRF chips\u003c\/th\u003e\n\u003ctd\u003e2x Semtech LR1121\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTelemetry power\u003c\/th\u003e\n\u003ctd\u003eUp to 100mW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAntennas\u003c\/th\u003e\n\u003ctd\u003e2x 2.4GHz wire + 2x 900MHz wire\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFrequency range\u003c\/th\u003e\n\u003ctd\u003e2.404–2.479GHz \/ 903.5–926.9MHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMax refresh rate\u003c\/th\u003e\n\u003ctd\u003e500Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMin refresh rate\u003c\/th\u003e\n\u003ctd\u003e50Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWorking voltage\u003c\/th\u003e\n\u003ctd\u003e4.5–8.4V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd\u003e2.70g without antennas \/ 5.30g with antennas\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e27.2 x 27.2mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFirmware\u003c\/th\u003e\n\u003ctd\u003eExpressLRS v3.3.2 pre-installed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBus interface\u003c\/th\u003e\n\u003ctd\u003eCRSF\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eShips on FCC 915MHz firmware\u003c\/strong\u003e (903.5-926.9MHz), which is the US band. \u003cstrong\u003eIn India\u003c\/strong\u003e the licence-free sub-GHz band is 865-867MHz - reflash radio and receiver to the ExpressLRS \u003cstrong\u003eIN866\u003c\/strong\u003e domain before using 900MHz. 2.4GHz needs no change.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull Gem-X\u003c\/strong\u003e needs a dual-band transmitter: GX12, TX16S MK3 \/ MK3 MAX or the Nomad module.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e 20 x 20mm holes - fits a 20x20 stack position or fixed-wing bay. Too large for whoops and small cinewhoops.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWiring:\u003c\/strong\u003e CRSF to an FC UART, 4.5-8.4V supply.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWorks with (available at AeroFlow)\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/nomad-dual-1-watt-gemini-xrossband-expresslrs-module\"\u003eRadioMaster Nomad Dual 1W Gemini Xrossband module\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/radiomaster-gx12-dual-band-gemini-x-radio-controller-m2\"\u003eRadioMaster GX12 Dual-Band radio\u003c\/a\u003e, \u003ca href=\"\/products\/radiomaster-tx16s-mk3-radio-controller-elrs-m2\"\u003eTX16S MK3\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003eFixed-wing FCs: \u003ca href=\"\/products\/matek-wing-flight-controller-v3\"\u003eMatek Wing V3\u003c\/a\u003e, \u003ca href=\"\/products\/tbs-lucid-h7-wing-fc\"\u003eTBS Lucid H7 Wing\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eIn the box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1x DBR4 Gemini Xrossband receiver\u003c\/li\u003e\n\u003cli\u003e2x 2.4GHz wire antenna\u003c\/li\u003e\n\u003cli\u003e2x 900MHz wire antenna\u003c\/li\u003e\n\u003cli\u003e1x CRSF wire\u003c\/li\u003e\n\u003cli\u003e4x 4mm red vibration dampeners\u003c\/li\u003e\n\u003cli\u003e4x 3mm black vibration dampeners\u003c\/li\u003e\n\u003cli\u003e1x manual card\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"RadioMaster","offers":[{"title":"Default","offer_id":46415303770146,"sku":"AF-RM-DBR4-DUAL-BAND","price":3299.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0900\/8562\/1794\/files\/09_1400x_69c27a36-4825-4f60-934d-c597f1685678.jpg?v=1787514471","url":"https:\/\/aeroflow.in\/products\/radiomaster-dbr4-dual-band-xross-gemini-elrs-receiver","provider":"AeroFlow","version":"1.0","type":"link"}