RadioMaster GX12 RC Radio Controller — Dual-Band ELRS Gemini-X, 2.4GHz/900MHz, EdgeTX, CNC Hall Gimbals, FCC
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RadioMaster GX12 RC Radio Controller — Dual-Band ELRS Gemini-X, 2.4GHz + 900MHz, EdgeTX, CNC Hall Gimbals
The RadioMaster GX12 is the world’s first radio controller to feature ExpressLRS Gemini Xrossband (Gem-X) — a revolutionary dual-band system that transmits simultaneously on 2.4GHz and 900MHz (Sub-G) for unmatched interference rejection and link reliability. Powered by EdgeTX and equipped with GX01 1000Hz CNC aluminum 3D digital hall-sensor gimbals with folding sticks, the GX12 delivers the highest level of precision, responsiveness, and feature depth available in a compact EdgeTX radio. Dual 1-watt transmitters, an active cooling system, hydrophobic PCB nano coating, and 512MB integrated flash make this the definitive long-range FPV and UAV radio for 2024 and beyond.
Available Configurations
- GX12 M2 — Controller only with standard M2 gimbals; uses 7.4V 2S LiPo battery (not included)
- GX12 M2 + BL18650 — Controller + BL18650 battery pack; plug-and-play 18650-powered option
- GX12 M2 + 18650 — Controller + 18650 battery tray; use two 3.7V 18650 Li-Ion cells (not included)
- GX12 M2 + 5000 (21700) — Controller + high-capacity 21700 5000mAh battery for maximum flight session endurance
- GX12 M2 + DBR4 — Controller + DBR4 Gem-X receiver; complete turnkey dual-band ELRS system
- GX12 + BL18650 + DBR4 — Controller + BL18650 battery + DBR4 receiver bundle
- GX12 + 18650 + DBR4 — Controller + 18650 tray + DBR4 receiver bundle
- GX12 + BL5000 + DBR4 — Controller + 21700 5000mAh battery + DBR4 receiver; maximum endurance complete system
Key Features
- ExpressLRS Gemini Xrossband (Gem-X) — World’s First Dual-Band ELRS Radio — Simultaneous 2.4GHz + 900MHz transmission delivers unmatched cross-band interference rejection; compatible with all current 2.4GHz and 900MHz ELRS receivers plus next-gen Gem-X receivers
- Dual 1-Watt Transmitters (2×1000mW) — Maximum RF output power on both bands; active cooling fan keeps the radio thermal-stable even at full power output
- GX01 1000Hz CNC Hall-Sensor Gimbals — Fully CNC-machined aluminum 3D digital hall-effect gimbals operating at 1000Hz with EdgeTX sync; folding gimbal sticks for compact transport; 3mm stick diameter
- EdgeTX Firmware — Latest EdgeTX transmitter firmware with full customization, Lua script support, and EdgeTX Companion PC software for updates and configuration
- 128×64 Monochrome OLED Display — High-contrast OLED for clear status readout in any lighting condition
- 512MB Integrated Flash Storage — No TF/SD card required; high-speed onboard flash for models, audio, and firmware
- Removable Modular Switch Panels — Swap switch layouts easily with included modular panel system; individually programmable 6-position SA/SD switches with customizable RGB indicator LEDs
- DIY SMA Ports — Optional external antenna connections via SMA ports; folding integrated dual-band antennas (2.4GHz + Sub-G 900MHz omni-directional) included
- USB-C All-in-One Port — Single USB-C handles 2S smart balance charging, SIM/simulator connectivity, firmware updates, and flash memory access
- Hydrophobic PCB Nano Coating + Reinforced Body — Thicker plastics and hydrophobic nano-coated PCB engineered for hot, cold, dry, and humid field conditions
- External Module Bay — Nano/Crossfire-compatible external module bay for expanded protocol support
Specifications
- Model: RadioMaster GX12
- Firmware: EdgeTX (TX) / ExpressLRS (RF)
- RF System: Dual-band ELRS Gemini Xrossband (Gem-X)
- Frequencies: 2.4GHz + Sub-G 900MHz (simultaneous)
- RF Output: Dual 1,000mW (2×1W)
- Antennas: Dual folding omni-directional (2.4GHz + 900MHz)
- Channels: Up to 16CH (receiver dependent)
- Gimbal: GX01 — 1000Hz, 3D Digital CNC Hall Effect, folding sticks, 3mm
- Display: 128×64 monochrome OLED
- Storage: 512MB integrated flash
- Voltage Range: 6.6–8.4V DC
- Current Draw: 390mA–1000mA (depending on RF output)
- Charging: 2S smart balance charging via USB-C
- Battery Options: 7.4V 2S LiPo / 2× 3.7V 18650 Li-Ion / 21700 5000mAh (not included with base variants)
- External Module: Nano / Crossfire compatible
- Cooling: Active cooling fan
- Dimensions: 183×148×78mm
- Weight: 573g (without battery)
- Version: FCC
- Recommended Age: 14+
What’s in the Box
- 1× GX12 Radio Controller
- 1× Signature Carry Case
- 1× 18650 Battery Tray
- 2× Replacement Switch Panels
- 1× Type-C Cable
- 1× Screen Protector
- 1× 1.5mm Hex Wrench
- 4× Low Tension Gimbal Springs
- 1× 2-Position Switch
- 1× Momentary Switch
- 1× RadioMaster Sticker Set
- 1× GX12 Manual
- DBR4 Gem-X receiver included in DBR4 bundle variants only
- Battery included in BL18650, 18650, and BL5000 variants only; batteries not included with base M2 variant
Perfect For
- Advanced FPV pilots who want the absolute best ELRS link performance with simultaneous dual-band Gem-X cross-band transmission
- Long-range UAV and freestyle pilots demanding 1W dual-band RF output, 1000Hz hall gimbals, and full EdgeTX flexibility in a compact form factor
- Competition pilots moving from single-band ELRS radios to a future-proof dual-band Gem-X ecosystem
- Pilots who value field durability with hydrophobic PCB coating, active cooling, and reinforced construction
Shipping Policy
Estimated Delivery: Orders typically arrive within 3-7 business days to most locations in North America.
International Shipping: Available with tracking. Transit times vary by destination.
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 FPV experts for free assistance.