Holybro Zephyr Gemini X ELRS Receiver | Dual-Band Diversity
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Dual-Band ExpressLRS Reception for Your FPV Build
The Holybro Zephyr Gemini X is an ExpressLRS receiver with two Semtech LR1121 RF chips, an ESP32-PICO-D4 processor and true-diversity reception. Its listed sub-GHz and 2.4GHz capabilities give experienced builders flexible radio-link configuration options with a compatible transmitter and firmware.
For your next build or receiver upgrade, check the transmitter's supported modes first, then plan antenna placement and a regulated power connection. The included dual-band T-antennas and compact receiver board help you integrate the radio link without assuming a particular frame or flight controller is universally compatible.
Key Features
- Gemini X dual-band ELRS design with two LR1121 RF chips.
- True-diversity reception with two included dual-band T-antennas.
- TCXO oscillator.
- Listed refresh-rate range of 50–500Hz, depending on configuration.
- Built-in Wi-Fi antenna for supported firmware updates.
- Compact 16 × 27 × 5mm board dimensions, excluding antennas.
Transmitter and Firmware Compatibility
The existing product information describes configuration in either 915MHz/sub-GHz or 2.4GHz LoRa mode. Gemini X operation, available packet rates and any simultaneous cross-band operation depend on matching transmitter hardware and compatible ExpressLRS firmware. Do not assume every ELRS transmitter can use every supported mode, or that a receiver alone adds Gemini X capability to a single-band transmitter.
Match the transmitter and receiver firmware requirements, binding settings and operating band before use. The supplied antenna specification covers 902–928MHz and 2400–2500MHz; other sub-GHz antenna bands are not established by this listing.
Technical Specifications
- Brand / model: Holybro Zephyr Gemini X.
- Processor: ESP32-PICO-D4.
- RF hardware: Two Semtech LR1121 chips.
- Listed maximum RF transmit power: 100mW / 20dBm on both the 900MHz and 2.4GHz bands. On this receiver, this is not a handheld transmitter power rating or a range guarantee.
- Antenna frequency ranges: 902–928MHz and 2400–2500MHz.
- Listed antenna gain: 3 ± 1dBi.
- Listed antenna SWR: Less than 1.5.
- Refresh rates: Listed minimum 50Hz, maximum 500Hz; mode and firmware dependent.
- TCXO: Yes.
- Listed modulation: LoRa and FSK.
- Input voltage: DC 4–7V.
- Listed current requirement: Up to 350mA at 5V.
- Wiring connector: SH1.0.
- Antenna connectors: IPEX1.
- Dimensions without antennas: 16 × 27 × 5mm.
- Listed weight: 2.3g without antennas; 11g with antennas.
Perfect For
FPV builders adding an ExpressLRS control receiver to a compatible quadcopter or RC aircraft, especially when selecting hardware around dual-band or Gemini X-capable radio equipment. This is a control-link receiver, not an FPV video receiver.
What's Included
- One Holybro Zephyr Gemini X receiver.
- Two dual-band T-antennas.
- One SH1.0 four-pin cable.
- One heatshrink tube.
The current option is labeled “No plug,” while the contents list specifies a four-pin cable. This label does not define a mains-power plug requirement; confirm the supplied lead and its pinout for your installation. A radio transmitter, flight controller and battery are not included.
Installation and Safety
- Use a regulated DC supply within the specified 4–7V input range. Do not connect directly to a higher-voltage flight battery.
- Verify the cable pinout, polarity and flight-controller interface before connecting power.
- Secure both antennas and route them away from propellers, moving parts and sources of interference.
- Remove propellers during setup, then check binding, control channels and failsafe operation before flight.
- Install suitable firmware for the exact hardware and confirm the selected radio mode with the transmitter.
The source recommends ages 14 and above; RC installation experience and suitable supervision are advised. For transmitter compatibility and wiring questions, contact sales@thedroneflight.com.
Shipping Policy
Estimated Delivery: Orders ship within 24–48 hours with full end-to-end tracking. Transit times typically take under 13 days (6–12 business days) to most destinations.
International Shipping: Global fulfillment from our nearest warehouse with tracking provided upon dispatch.
Return & Guarantee Policy
Return Policy: Defective or damaged item? Return it within 30 days for a full refund. Customer pays return shipping.
Technical Support: Need help with compatibility or setup? Contact our US-based FPV experts at (951) 592-5658 for free assistance.
