RadioMaster GX15 MAX Radio Controller : RM0157.0136-MAX-LBT
RadioMaster expands the GX series with the GX15 MAX. Designed for pilots who fly RC airplanes, gliders, helicopters, and other traditional aircraft, the GX15 MAX combines modern performance with premium materials and refined controls for pilots who demand the highest level of precision and feel.
For pilots who prefer the same core performance in a more accessible configuration, the standard GX15 is also available.
Features
High-Performance Processor: STM32 H7 processor delivers fast and responsive system performance.
Touchscreen Display: 3.5-inch IPS touchscreen (480 × 320) with 262K colours and up to 600 nits brightness for clear outdoor visibility.
Dual 2.4GHz ExpressLRS (Gemini): Powered by dual 250mW SX1281 transceivers, the GX15 delivers reliable Gemini performance while supporting ultra-fast ExpressLRS update rates, including F1000 operation with compatible receiver systems.
Intelligent Battery Management: Optimises power usage and extends operating time.
Efficient Cooling System: Low-noise fan with aluminium heat sinks ensures stable operation in demanding conditions.
Dual Integrated 2.4GHz Antennas: Internal horizontal and vertical antenna arrangement provides polarisation diversity while maintaining a clean, antenna-free exterior.
CNC Controls: Aluminum buttons and precision scroll wheel.
Built-in Microphone: Reserved for future feature expansion.
Built-in Gyroscope: Enables tilt-based control inputs for switches, gimbals, and telemetry functions.
Storage: Built-in flash memory with external SD card support.
Interchangeable Shoulder Switches: Configurable control layout with replaceable switch modules.
Premium Case: Carbon-look shell for improved finish and style.
Multiple Colour Options: Available in five colour variants: Black / Transparent Charcoal / Red / Gold / Blue.
The GX15 MAX features a top-mounted 3.5-inch IPS touchscreen with 262K colours and up to 600 nits brightness. Positioned above the controls, the display keeps telemetry, timers, and flight information easily visible throughout flight, allowing pilots to monitor critical data without their hands obstructing the screen.
Powered by a high-performance STM32 H7 processor, the GX15 MAX delivers a significant increase in computing performance over previous generations. The result is a smoother EdgeTX experience, faster script execution, and near-instant model switching. With onboard flash memory and support for external TF cards, the GX15 MAX offers a dual-storage system for secure and flexible data management.
At its core, the GX15 MAX features dual Semtech SX1281 transceivers supporting Gemini 2.4GHz ExpressLRS (ELRS). Designed for modern aircraft and helicopter systems, the GX15 MAX delivers low-latency control and supports ultra-fast update rates, including F1000 operation with compatible receivers such as the Nexus-XR. Working together with dual integrated antennas positioned behind the display in both horizontal and vertical orientations, the system provides Gemini redundancy, polarisation diversity, and reliable signal performance while maintaining a clean form factor free from bulky external antennas.
The GX15 MAX is equipped with precision CNC-machined AG02 Hall sensor gimbals, delivering exceptional control feel, smooth operation, and long-term durability. Aluminum buttons, a CNC aluminium scroll wheel, and upgraded controls provide a solid and consistent interface throughout the radio. The carbon-look case completes the premium design while maintaining excellent balance and comfort during extended flying sessions.
A built-in cooling system with a low-noise fan and aluminium heat sinks ensures stable operation during extended use and demanding environmental conditions. The USB-C interface supports charging, simulator connectivity, firmware updates, and high-speed data transfer.
A smart battery management circuit improves efficiency and extends operating time, while the built-in gyroscope enables additional control inputs. Tilt-based functions can be used to trigger logical switches, control gimbal movement, or activate telemetry voice prompts—adding flexibility without additional hardware.
Interchangeable shoulder switch modules allow pilots to configure controls to their preference, including the option to replace switches with momentary buttons. The GX15 MAX combines the advanced performance of the GX15 platform with premium materials, AG02 CNC gimbals, and refined controls for pilots seeking the ultimate GX series experience.
Specification
Item: GX15 MAX Radio
Colour: Black / Transparent Charcoal / Red / Gold / Blue
Voltage Range: 6.6 - 8.4V DC
Current: 850mA (at max output power)
Frequency: 2.400GHz
Internal RF: ExpressLRS 2.4GHz
Channels: Max 16 channels (Receiver dependent)
Radio Firmware: EdgeTX (Transmitter) (requires version 2.12.0 or higher)
Built-in Flash Storage: 512MB
Cooling Fan: Yes
Built-in Microphone: Yes (Future expansion)
Built-in Motion Sensor: Yes
MicroSD card (Not included): 32GB/FAT32 (Inserting a MicroSD card will disable the onboard flash)
Display: 3.5-inch IPS touchscreen (480 x 320 resolution)
Battery: 7.4V 2-cell Lithium-Polymer / Two 3.7V 18650 Lithium-Ion cells / 21700 5000mAh Battery (batteries not included)
Connectivity: USB-C
Gimbals: AG02 CNC Hall sensor gimbals
Gimbal Sticks: M4
Upgrade Method: USB-C (UF2)
Module Bay: JR-compatible module bay for additional modules
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