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Overview:
The Radiomaster AX12 brings together advanced Android performance, built-in ExpressLRS connectivity, HDMI video support, powerful processing, and app compatibility - working seamlessly to unlock new ways to build, control, and innovate.
The AX12 is a versatile platform designed for pilots, filmmakers, rover builders, boat enthusiasts, and creators who value the familiarity of Android combined with Radiomaster’s renowned build quality and RF performance.
At its core, the AX12 merges Radiomaster’s proven radio control system with RadiomasterOS, an Android-based platform that simplifies setup, configuration, and field operation without compromising control.
RadiomasterOS is Radiomaster’s first Android-powered operating system, purpose-built for transmitters. It offers an intuitive model setup experience alongside touchscreen access to compatible Android apps for configuration, telemetry, and mission planning. This is not simply Android layered onto a transmitter — it's a dedicated radio control system enhanced by an open Android foundation.
Powered by an octa-core processor with 4GB RAM and 64GB of internal storage, the AX12 delivers smooth and responsive performance for control tasks, telemetry monitoring, supported ground station applications, and utilities. The 5.5" HD IPS touchscreen (1280x720) provides sharp visuals with up to 1000nits of brightness, ensuring excellent visibility even in direct sunlight. Its responsive interface makes navigating menus and adjusting settings quick and intuitive in the field.
Despite its advanced computing capabilities, the AX12 remains a fully featured transmitter. It supports full 16-channel ELRS control, including advanced mixing, flexible channel mapping, custom curves (with up to 12-point adjustment), adjustable dual rates, and channel locking. Preset and user-defined model templates, full model import and export, custom model images and configurable voice prompts.
The built-in ExpressLRS LR1121 module supports both 2.4GHz and Sub-G 900MHz operation, delivering low latency and robust link performance. It also supports Wi-Fi OTA firmware updates for the internal RF module. MAVLink passthrough enables compatible applications, such as QGroundControl and Betaflight Configurator, to run directly on the radio, for efficient field config and telemetry setup.
The HDMI input supports video from compatible digital video systems on the AX 12 display, while HDMI output mirrors the screen to an external monitor or projector for teaching, review, or team use. Using the DJI Fly app and a simple USB-C OTG connection, the AX12 can display the live video feed from DJI goggles directly on its built-in HD screen. This enables friends, or instructors to view the flight in real time while the pilot continues flying via the goggles. The mirrored display can also serve as a handy backup screen for recording or live-streaming the flight.
Features:
- Radiomaster OS (Android 9.0): Google Play certified with full APK sideloading support, allowing compatible ground station, configuration, and utility apps to be installed directly on the radio.
- 5.5" HD IPS Touchscreen: 1280x720 resolution with high brightness for clear outdoor visibility and responsive touch control.
- X5 Hall-Effect Gimbals: Contactless Hall sensors provide precise, stable control, with onboard stick storage (compatible with AG01-NANO CNC gimbal upgrade).
- Octa-Core Processor: 8-core CPU with 4GB RAM and 64GB storage, optimised for radio configuration, telemetry display, supported Android apps, and multitasking.
- HDMI Input for Digital Video Systems: View video from compatible digital systems directly on the AX12 screen.
- HDMI Output: One-click mirroring or extended display to a TV or projector for a larger viewing experience.
- Built-in ExpressLRS (Single LR1121 Module): Supports 2.4GHz or Sub-G 900MHz operation, offering low latency, strong link performance, and Wi-Fi OTA firmware updates.
- MAVLink Passthrough (Wi-Fi): Enables compatible apps such as QGroundControl to display telemetry and support field configuration workflows.
- 16-Channel ExpressLRS Control: Full 16-channel operation with flexible channel mapping.
- Advanced Mixing & Custom Curves: Arbitrary channel mapping with adjustable weights, offsets, Expo curves, function curves, and precise 12-point custom curves.
- Dual Rates & Channel Locking: Fully adjustable dual rates with channel locking functionality.
- Model Templates & Management: Preset and user-defined templates, full model import/export capability, and support for custom model images.
- Voice Prompts & Feedback: Customisable voice alerts with text-to-speech, MP3 playback, and condition-based announcements.
- Lua Script Support (Tools): Run community and custom Lua scripts via the Tools menu for advanced telemetry processing and workflow customisation.
- Control Layout: 4x 3-position switches, 2x 2-position switches, 2x analogue scroll wheels, and a 6-position button, all fully mappable in software.
- Nano External Module Bay: Supports nano-size external modules, including compatible ExpressLRS modules.
- Audio Output: Built-in speaker and 3.5mm headphone jack.
- Dual 21700 Battery System: Approximately 10000mAh total capacity for extended operating time.
- Connectivity & I/O: Wi-Fi, Bluetooth, and USB-C for charging and data.
- Open App Ecosystem: Install compatible Android apps via Google Play or APK sideloading.
Specification:
- Model: Radiomaster AX12 Transmitter
- Working Current: 1.10A (at maximum output power)
- Frequency: 2.400GHz or Sub-G 900MHz
- Internal RF: ExpressLRS 2.4GHz/Sub-G 900MHz
- Supported Protocols: ExpressLRS
- Channels: Up to 16 (depending on receiver)
- Display: 5.5inch HD touchscreen (1280x720)
- Device Firmware: Android 9.0 (not upgradeable)
- Radio Firmware: Radiomaster OS
- Charging: Requires a USB Power Delivery (PD) compatible power supply
- Gimbals: High-precision X5 Hall-effect gimbals (optional AG01-NANO upgrade available)
- Gimbal Sticks: Removable and storable
- Internal Storage: 64GB onboard flash memory
- External Module Support: Nano module bay
- Battery: Dual 3.7V 21700 lithium batteries (built-in)
- Firmware Updates: Online automatic updates via Wi-Fi
- Dimensions: 171x168x73mm
- Weight: 640g
Included:
- 1x Radiomaster AX12 Transmitter (ELRS)
- Accessories
