Oh good, another receiver that claims to change your life. Except this one actually might. The BAYCKRC C3 Gemini RX is an absolute unit of a flight controller companion, packing dual LR1121 RF chips and a TCXO into a 1.6g footprint. We’ve seen a lot of FPV tech over the last decade, but true dual-band ExpressLRS capability on the 868/900MHz and 2.4GHz frequencies simultaneously? That’s not marketing fluff; that’s a radio link that refuses to drop, even when you’re flying behind a concrete block of flats. If you’re sick of your 5-inch falling out of the sky on long-range missions, this tiny blue menace is the upgrade your quad has been begging for.
Highlights
True Dual-Band Gemini Design: Utilizes two separate RF chains for simultaneous 868/900MHz and 2.4GHz transmission. Redundancy is king.
TCXO Stability: Temperature-compensated crystal oscillator means your frequency stays locked tight whether you’re flying in the freezing British winter or a heatwave.
Punchy 100mW Output: 2x 100mW TX power ensures your link stays robust without cooking the silicon.
Featherweight Champion: Weighs a negligible 1.6g. You literally have no excuse not to put this on your next micro long-range build.
Why You Want It
If you are pushing max range, fighting through noise floors at the local raceway, or just want a link that feels like an invisible tether, the C3 is the answer. Standard receivers tap out when the multipath interference gets heavy. The Gemini architecture uses cross-band redundancy to dominate environments where standard ELRS receivers cry and disconnect. Its tiny, its reliable, and it runs on the bulletproof ESP32-C3 platform.
Specs
Model: BAYCKRC C3 900/2400 Dual Band 100mW Gemini RX
RF Frequency: 868MHz / 900MHz / 2.4GHz
IC / Processor: 2x LR1121 + ESP32-C3 + TCXO
TX Power: 2x 100mW @ 868MHz/900MHz/2.4GHz
Input Power: 3.6V – 5.5V
Weight: 1.6g (receiver board only)
Dimensions: 17mm x 26.5mm
Connector: 2x IPEX 1
Color: Blue (because red goes faster, but blue locks in tighter)
Firmware: BAYCKRC C3 900/2400 Dual Band 100mW Gemini RX
FAQ
What makes a Gemini receiver better for long-range FPV?
Gemini receivers use two separate RF chips to receive on two different frequency bands (e.g., 900MHz and 2.4GHz) at the exact same time. If one frequency gets blocked by interference, the other maintains the link, drastically reducing the chance of a failsafe.
Can I run standard ExpressLRS firmware on this?
You must flash the speci
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