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iFlight ExpressLRS ELRS True Diversity Receiver

The iFlight ExpressLRS ELRS True Diversity Receiver is a dual-antenna receiver for long-distance flights, aerial photography and FPV freestyle. It combines Gemini/True Diversity operation, integrated shielding and a temperature-compensated oscillator. Available in 868/900MHz and 2.4GHz versions, it is supplied with two antennas.

iFlightRC transmitters & receivers
Weight
4.2 g
Dimensions
24.3*18.5*6.5 mm

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Product overview

Developed in cooperation with the ExpressLRS Team, the iFlight ExpressLRS ELRS True Diversity Receiver supports long-distance flying, aerial photography and FPV freestyle on drones above 5 inches. Its dual antennas and integrated shielding enhance interference resistance and signal reception. A TCXO temperature-compensated crystal oscillator counters frequency shifts caused by temperature changes. The receiver supports Gemini and True Diversity modes; Gemini operation requires a transmitter that also supports Gemini mode.

Built around an ESP32-Pico D4 MCU with CRSF protocol, the receiver comes in 868MHz EU/900MHz FCC and 2.4GHz ISM versions. Telemetry power is 100-500mW (20-27dBm) at 868/900MHz and 50-250mW (17-24dBm) at 2.4GHz. Each package contains one receiver and two antennas, with lengths determined by the selected antenna configuration. Install the antennas away from conductive or magnetic components, including carbon, metal and motors. The 2.4GHz version includes an LNA and supports packet rates up to 500hz.

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Specifications

iFlight ExpressLRS ELRS True Diversity Receiver specifications
SpecificationValue & conditions
Product typeIFlight ExpressLRS ELRS True Diversity Receiver; true dual-antenna diversity receiver developed with the ExpressLRS Team
ApplicationsLong-distance flights, aerial photography and FPV freestyle
Drone size suitabilityDrones above 5 inches, especially long-range drones
Antenna and shielding constructionDual antennas with shielding covers for interference resistance and wider signal reception
OscillatorTCXO temperature-compensated crystal oscillator
MCUESP32-Pico D4
Receiver typeGemini/True Diversity
Transmitter requirementRequires a transmitter supporting Gemini modeGemini mode.
FirmwareIFlight 900MHz 500mW Diversity RX868MHz/900MHz version.
FirmwareIFlight 2.4GHz 250mW Diversity RX2.4G version.
Lua scriptIF 900 500mW GRX868MHz/900MHz version.
Lua scriptIF 2G4 250mW GRX2.4G version.
Frequency bands868MHz EU/900MHz FCC and 2.4GHz ISM
Telemetry power100-500mW (20-27dBm)868/900MHz version.
Telemetry power50-250mW (17-24dBm)2.4G version.
Dimensions24.3*18.5*6.5mm868/900MHz version.
Dimensions24.5*18.6*6.3mm2.4G version.
ProtocolCRSF
LNAN/A868/900MHz version.
LNAYES2.4G version.
Weight4.2g868/900MHz version.
Weight3.3g2.4G version.
Maximum packet rateUp to 500hz2400MHz band.
Antenna installationInstall antennas away from conductive or magnetic components, including carbon, metal and motors
Packing list1 x ExpressLRS Diversity Receiver; 2 x Antenna
Supplied antenna configurations2x 70mm Mini Antenna or 2x 40mm Mini AntennaELRS 2.4G RX antenna package options.
Additional supplied antenna configurations2x 220mm Mini Antenna or 1x 70mm Antenna + 1x 220mm AntennaELRS 2.4G RX antenna package options.
160mm supplied antennas2x 160mm AntennaELRS 2.4G RX antenna package option.
Supplied antenna configurations2x 70mm Antenna or 2x 220mm AntennaELRS 868/900MHz RX antenna package options.
Additional supplied antenna configurations1x 70mm Antenna + 1x 220mm Antenna or 2x 160mm AntennaELRS 868/900MHz RX antenna package options.

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