{"product_id":"radiomaster-dbr4-receiver","title":"RadioMaster DBR4 Dual Band Xross Gemini ExpressLRS Receiver","description":"\u003cp\u003eIntroducing the DBR4 Receiver: the perfect companion to the \u003ca href=\"https:\/\/www.radiomasterrc.com\/products\/nomad-dual-1-watt-gemini-xrossband-expresslrs-module\" rel=\"noopener\" target=\"_blank\"\u003eRadioMaster Nomad\u003c\/a\u003e. The DBR4 is a cutting-edge dual-band, dual-channel Gemini receiver that ensures seamless compatibility with the Nomad module. Engineered for superior performance, the DBR4 boasts two dual-band sections, each capable of simultaneously receiving 2.4GHz and 900MHz signals. This innovative design allows for the reception of two data streams simultaneously, providing exceptional interference rejection and eliminating the risk of lost packets. With the DBR4, you can trust that your signal remains robust and reliable, giving you the confidence to push your limits and explore new horizons. Elevate your RC experience with the unparalleled connectivity and performance of the DBR4 Receiver.\u003c\/p\u003e\n\u003cp style=\"text-align: start;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0609\/8324\/7079\/files\/DBR4_-pc_01.gif?v=1725527720\" alt=\"DBR4 Dual Band Xross Gemini ExpressLRS Receiver\" style=\"float: none;\"\u003e\u003c\/p\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eTelemetry RF power: Max 2x 100mw\u003c\/li\u003e\n\u003cli\u003eExperience unmatched reliability with dual-band ELRS Gemini Xrossband\u003c\/li\u003e\n\u003cli\u003eExpressLRS Gemini 2.4GHz\u003c\/li\u003e\n\u003cli\u003eExpressLRS Gemini 868\/900MHz\u003c\/li\u003e\n\u003cli\u003e4 Descrete antennas for optimal antenna arrangement\u003c\/li\u003e\n\u003cli\u003e20 X 20mm mounting holes\u003c\/li\u003e\n\u003cli\u003eXrossband GemX support\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecification\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eItem: DBR4 Gemini Xrossband ExpressLRS Receiver\u003c\/li\u003e\n\u003cli\u003eType: ISM_2.4, FCC_915\u003c\/li\u003e\n\u003cli\u003eMCU: ESP32\u003c\/li\u003e\n\u003cli\u003eRF chip: Semtech LR1121 x 2\u003c\/li\u003e\n\u003cli\u003eTelemetry RF power: Max 100mW\u003c\/li\u003e\n\u003cli\u003eAntenna: 2 x 2.4GHz wires \u0026amp; 2 x 900MHz wires\u003c\/li\u003e\n\u003cli\u003eFrequency Range: 2.404 - 2.479 GHz \/ 903.5 - 926.9 MHz\u003c\/li\u003e\n\u003cli\u003eMaximum receive refresh rate: 500Hz (1000Hz coming soon in ExpressLRS V3.4)\u003c\/li\u003e\n\u003cli\u003eMinimum receiver refresh rate: 50Hz\u003c\/li\u003e\n\u003cli\u003eWorking voltage: DC 4.5 - 8.4V\u003c\/li\u003e\n\u003cli\u003eWeight: Without antennas 2.70g \/ With antennas 5.30g\u003c\/li\u003e\n\u003cli\u003eDimension: 27.20 *27.20mm\u003c\/li\u003e\n\u003cli\u003eFirmware Version: ExpressLRS v3.3.2 pre-installed\u003c\/li\u003e\n\u003cli\u003eBus interface: CRSF\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"text-align: start;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0609\/8324\/7079\/files\/DBR4_-pc_02.gif?v=1725527719\" alt=\"DBR4 Dual Band Xross Gemini ExpressLRS Receiver\" style=\"float: none;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0609\/8324\/7079\/files\/lQDPKGn4oBRYjEfNAj_NBACwxguuUy6t4zcGyA6EyloUAA_1024_575.jpg?v=1725936172\" alt=\"DBR4 Dual Band Xross Gemini ExpressLRS Receiver\" style=\"float: none;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0609\/8324\/7079\/files\/DBR4_-pc_07.gif?v=1725527719\" alt=\"DBR4 Dual Band Xross Gemini ExpressLRS Receiver\" style=\"float: none;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/DBR4_-pc._06.jpg?v=1778139644\" alt=\"DBR4 Dual Band Xross Gemini ExpressLRS Receiver\" style=\"float: none;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0609\/8324\/7079\/files\/DBR4_-pc_10.gif?v=1725527719\" alt=\"DBR4 Dual Band Xross Gemini ExpressLRS Receiver\" style=\"float: none;\"\u003e\u003c\/p\u003e\n\u003ch2\u003eNew Packet Rates\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eSub-GHz 250Hz (-111dBm)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpeed Boost: \u003c\/strong\u003eAchieve faster packet rates with enhanced sub-GHz performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSub-GHz 200Hz Full (-111dBm)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDouble the packet rate compared to traditional 900MHz SX1276-based modules. This enhancement provides a significantly more robust and reliable connection, along with improved resistance to interference in demanding setups.\u003cbr\u003eEnjoy faster data throughput and greater stability, making it an ideal upgrade for advanced configurations that rely on seamless telemetry and control.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eDual Band X150Hz (-112dBm)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGemini Mode: \u003c\/strong\u003eExperience simultaneous sub-GHz and 2.4GHz transmissions, providing robust performance and reduced interference with a packet rate of 150Hz.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eDual Band X100Hz Full (-112dBm)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Gemini Mode: \u003c\/strong\u003eAchieve the same dual-frequency transmission benefits at a 100Hz packet rate with full 16 channel resolution, ensuring strong and stable connectivity even in challenging environments.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eIntroduction of K Modes\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eDK500 (Coming in ExpressLRS V3.5)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDesign specifically from the ground up for lovers of speed and RC reliability.  K modes are next generation FSK modulation with built in packet repair (Forward Error Correction).  Just like FLRC D500, DK500 sends repeat packets to reduce packet loss in challenging race event environments. Coupled with a Gemini enabled Tx and Rx, nothing comes close to RC reliability.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eK1000 Full SubGHs (Coming in ExpressLRS V3.5)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eYes, you read that correctly — 1000Hz on 868\/900MHz!\u003cbr\u003eThis mode is designed for maximum data throughput, and despite the extremely high update rate, testing has shown it to remain impressively stable and responsive.\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"text-align: start;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0609\/8324\/7079\/files\/Nomad-HP0157_04.jpg?v=1725524391\" alt=\"Nomad Dual 1-watt Gemini Xrossband ExpressLRS Module\" style=\"float: none;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0609\/8324\/7079\/files\/Nomad-HP0157_05.jpg?v=1725524391\" alt=\"Nomad Dual 1-watt Gemini Xrossband ExpressLRS Module\" style=\"float: none;\"\u003e\u003c\/p\u003e\n\u003ch2\u003eWeight\u003c\/h2\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0609\/8324\/7079\/files\/019287d85a5ece20b74e63f0e78b066a_35a7cb43-a591-4684-825c-4cb42504dc88_600x600.jpg?v=1725529011\" alt=\"DBR4 Dual Band Xross Gemini ExpressLRS Receiver\" style=\"float: none;\"\u003e\u003c\/p\u003e\n\u003ch2\u003eSize\u003c\/h2\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0609\/8324\/7079\/files\/DBR4_-pc_08_600x600.jpg?v=1725528577\" alt=\"DBR4 Dual Band Xross Gemini ExpressLRS Receiver\" style=\"float: none;\"\u003e\u003c\/p\u003e\n\u003ch2\u003ePackage Includes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1 * DBR4 Gemini Xrossband ExpressLRS Receiver\u003c\/li\u003e\n\u003cli\u003e2 * 2.4 GHz wire antennas\u003c\/li\u003e\n\u003cli\u003e2 * 900 MHz wire antennas\u003c\/li\u003e\n\u003cli\u003e1 * CRSF wire\u003c\/li\u003e\n\u003cli\u003e4 * 4mm Red vibration dampeners\u003c\/li\u003e\n\u003cli\u003e4 * 3mm Black vibration dampeners\u003c\/li\u003e\n\u003cli\u003e1 * Manual card\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"text-align: start;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0609\/8324\/7079\/files\/DBR4_-pc_09.gif?v=1725527719\" alt=\"DBR4 Dual Band Xross Gemini ExpressLRS Receiver\" style=\"float: none;\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg style=\"margin-right: 16px; float: left;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/44b5d11d20914da185c49f0da7d24adc.png?v=1763103206\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003e\u003cspan data-type=\"text\"\u003eDBR4 Receiver is installed with ExpressLRS as standard.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan data-type=\"text\"\u003eExpressLRS is an open-source, high-performance radio control link that delivers exceptional range and low-latency communication using advanced LoRa technology. It's highly customizable and perfect for RC enthusiasts looking for reliability and efficiency.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan data-type=\"text\"\u003ePair your ExpressLRS with Radiomaster's top-tier transmitters and receivers. Radiomaster products are designed to maximize the benefits of ExpressLRS, offering state-of-the-art performance for your RC adventures. Upgrade your RC experience with the unbeatable combination of ExpressLRS and Radiomaster—engineered for excellence and tailored for you.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003ca href=\"https:\/\/www.expresslrs.org\/\" rel=\"noopener\" target=\"_blank\"\u003e\u003cspan data-type=\"text\"\u003eFind out more about ExpressLRS here\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"RadioMaster","offers":[{"title":"FCC","offer_id":52965981585632,"sku":"HP0157.0086-1","price":46.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0643\/3210\/3904\/files\/09_ebef4d34-394f-49e4-a427-ff725e7af8c8.jpg?v=1780584426","url":"https:\/\/rcdrone.top\/nl\/products\/radiomaster-dbr4-receiver","provider":"RCDrone","version":"1.0","type":"link"}