RadioMaster AX12 Android FPV Radio Controller with ELRS & HDMI

Check out our AX12 Radio Controllers, all Radio Controllers Collection and the rest of our RadioMaster Products!

Smart Android-Based Radio Control System

The AX12 combines RadioMaster’s proven radio control technology with RadioMasterOS, an Android-based platform purpose-built for FPV pilots, simplifying setup, configuration, and field operation while maintaining reliable control performance. Designed specifically for radio systems rather than layered software, RadioMasterOS delivers an intuitive user experience with touchscreen access to compatible Android apps for configuration, telemetry, and mission planning, offering a flexible and modern FPV workflow without compromising stability or precision.

Powerful Performance and High-Brightness Display

Equipped with an octa-core processor, 4GB of RAM, and 64GB of storage, the AX12 delivers smooth and responsive performance for control tasks, telemetry monitoring, and running supported ground station apps. Its 5.5-inch HD IPS touchscreen (1280×720) offers sharp visuals and up to 1000 nits brightness, ensuring clear visibility even in direct sunlight, while the responsive touch interface allows for quick navigation and efficient adjustments during field operation.

Full-Featured Radio Control System

At its core, the AX12 remains a fully capable RadioMaster transmitter, supporting 16-channel ExpressLRS control with advanced mixing, flexible channel mapping, customizable curves including 12-point curves, adjustable dual rates, and channel locking. It also offers preset and user-defined model templates, full model import and export, custom model images, configurable voice prompts, and support for Lua scripts, providing extensive flexibility for advanced FPV setups and personalized control configurations.

Full-Featured Radio Control System

The built-in ExpressLRS LR1121 module supports both 2.4GHz and Sub-G 900MHz operation, delivering low latency and strong, reliable link performance, while also enabling convenient Wi-Fi OTA firmware updates for the internal RF system. With MAVLink passthrough support, the AX12 allows compatible applications such as QGroundControl and Betaflight Configurator to run directly on the radio, streamlining setup, tuning, and mission workflows without the need for external devices.

HDMI Video Integration and Real-Time Display

The AX12 features HDMI input and output, allowing it to display video from compatible digital FPV systems directly on its built-in screen while also mirroring the interface to an external monitor or projector for training, review, or team use. With support for the DJI Fly app via a simple USB-C OTG connection, the AX12 can show live video from DJI goggles on its HD display, enabling passengers, spotters, or instructors to view the flight in real time. The mirrored output also serves as a convenient backup screen or can be used for recording and live streaming the flight feed.

Features:

● RadioMasterOS (Android 9.0): Google Play certified with full APK sideloading support. Install compatible ground station, configuration, and utility apps directly on the radio.

● 5.5-inch High-Brightness HD IPS Touchscreen: 1280 × 720 resolution with 1000 nits brightness for clear outdoor visibility, combined with a responsive touchscreen interface for fast and intuitive control.

● X5 Hall-Effect Gimbals: Contactless Hall sensors for precise, stable control with onboard stick storage.

● Octa-Core Processor: 8-core CPU with 4 GB RAM and 64 GB storage, optimized for radio configuration, telemetry display, supported Android apps, and multitasking.

● HDMI Input for Digital Video Systems: View video from compatible digital video systems directly on the AX12 screen.

● HDMI Output: Mirror or extend the display to a TV or projector for teaching, review, or team use.

● Built-in ExpressLRS (Single LR1121 Module): Supports 2.4 GHz or Sub-G 900 MHz operation with low latency, strong link performance, and Wi-Fi OTA firmware updates.

● MAVLink Passthrough (Wi-Fi): Enables compatible apps, such as QGroundControl and Betaflight Configurator, to be used directly on the radio for supported workflows.

● 16-Channel ExpressLRS Control: Full 16-channel operation with flexible channel routing.

● Advanced Mixing & Custom Curves: Arbitrary channel mapping, adjustable weights and offsets, Expo curves, function curves, and precise 12-point custom curves.

● Dual Rates & Channel Locking: Freely adjustable dual rates and channel locking.

● Model Templates & Management: Preset and user-defined model templates, complete model import/export, and support for custom model images.

● Voice Prompts & Feedback: Customizable voice prompts with text-to-speech, custom MP3 files, and condition-based announcements.

● Tools Lua Script Support: Run community and custom Lua scripts via the Tools menu for advanced telemetry processing and workflow customization.

● Control Layout: 4 × 3-position switches, 2 × 2-position latching shoulder buttons, 2 × analog scroll wheels, and a programmable 6-position button. All switches and analog controls are mappable in software.

● Nano External Module Bay: Nano-size external module support for compatible ExpressLRS modules.

● Audio Output: Built-in speaker, 3.5 mm headphone jack.

● Dual 21700 Battery System: Approximately 10,000 mAh total capacity for extended operating time.

● Connectivity & I/O: Wi-Fi, Bluetooth, USB-C charging/data.

● Open App Ecosystem: Install compatible Android apps via Google Play or APK sideloading.

RadioMaster AX12 Buying Guide: Who Is It Really For?

The RadioMaster AX12 is not simply another ExpressLRS transmitter. It combines a 5.5-inch Android touchscreen, RadioMasterOS, ELRS control, MAVLink passthrough and HDMI video monitoring in one device. Its strongest commercial value is replacing several pieces of field equipment for pilots running autonomous aircraft, long-range missions, mapping, training or professional UAV operations.

MEPSKING Expert Assessment

In our MEPSKING expert assessment, the AX12 feels more like a portable ground-control station with physical sticks than a conventional FPV radio. The 1000-nit display is easy to read outdoors, model setup is logically organized, and having telemetry, configuration tools and video monitoring on the same screen makes field operation noticeably more efficient.

The X5 Hall gimbals provide clean and consistent inputs, although they are smaller than full-size gimbals and the approximately 640g controller feels screen-focused rather than optimized purely for stick ergonomics. Startup is also slower than a dedicated EdgeTX radio. For autonomous missions this is a reasonable trade-off; for pilots who only want to arm a freestyle quad and fly, it may be unnecessary complexity.

Why the AX12 Earns Its Price

The key advantage is workflow integration. Compatible Android applications such as QGroundControl can display MAVLink telemetry and mission information without requiring a separate tablet. HDMI input can show video from a compatible digital system, while HDMI output can mirror the display for a spotter, instructor, client or external recorder.

Its internal single LR1121 ExpressLRS module supports either 2.4GHz or Sub-G 900MHz operation with up to 16 channels. However, “dual-band” means that the pilot can select either frequency band—it is not Gemini dual-band simultaneous transmission.

RadioMaster AX12 vs TX15 Max

Important Limitations Before Ordering

The AX12 runs Android 9, and the Android version cannot be upgraded. Check that every mission-planning or configuration app you need still supports Android 9 before purchasing. RadioMasterOS is also not EdgeTX, so existing EdgeTX model files and Lua workflows should not be assumed to transfer perfectly.

HDMI video carries additional processing latency. We recommend it for monitoring, teaching, client viewing and autonomous-flight supervision—not as a replacement for low-latency FPV goggles during manual racing or freestyle. Charging also requires a USB Power Delivery-compatible supply, and the Nano module bay does not support every module, particularly unsupported STM32-based modules.

Final Purchase Recommendation

Buy the RadioMaster AX12 Android FPV controller if you specifically need ELRS control, MAVLink telemetry, Android applications and HDMI monitoring in one portable platform. For an ArduPilot aircraft, rover, mapping platform or professional filming workflow, its integrated design can justify the price. If your priority is conventional racing or freestyle with mature EdgeTX support and premium gimbals, consider the RadioMaster TX15 Max or RadioMaster TX16S MK3 Max instead.

Specification:

Package Included:

1 * AX12 Radio Controller

1 * AX12 Signature Carry Case

1 * Type-A to Type-C USB Cable

1 * Type-C to Type-C USB Cable

1 * Screen Protector

1 * 1.5mm Hex Wrench

4 * Low Tension Gimbals Springs

2 * AX12 Gimbal Dust Cover

1 * RadioMaster Sticker Set

1 * AX12 Manual

1 * Inventory Card

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