RadioMaster GX15 MAX ELRS, Gemini, AG02 Gimbals, 3.5 Inch Display, Charcoal
by RadioMaster

The RadioMaster GX15 MAX ELRS Gemini Transmitter (Charcoal) is an elite flagship RC radio controller featuring a premium carbon-look shell, AG02 CNC aluminum Hall-effect gimbals, CNC aluminum buttons, and a precision aluminum scroll wheel. Powered by an advanced STM32 H7 processor running EdgeTX (version 2.12.0 or higher required), the GX15 MAX is equipped with dual 2.4GHz ExpressLRS (Gemini) transceivers powered by twin SX1281 chips, delivering maximum link reliability and ultra-fast update rates up to F1000 operation with compatible receiver systems.

Designed for uncompromising outdoor visibility and control ergonomics, the transmitter incorporates a 3.5-inch IPS touchscreen (480 x 320 resolution, 262K colors, up to 600 nits brightness), an integrated 2.4GHz antenna, and an active cooling system with a low-noise fan and aluminum heat sinks. Key hardware features include an onboard gyroscope for motion/tilt-based inputs, an integrated microphone reserved for future feature expansion, configurable interchangeable shoulder switch modules, intelligent battery management, built-in flash storage with external MicroSD card support, and a standard JR-compatible module bay.

Key Features

• STM32 H7 High-Performance Processor: Delivers fast and responsive system performance for smooth EdgeTX execution.

• AG02 CNC Aluminum Hall Gimbals: Premium CNC-machined aluminum Hall-effect gimbals with M4 threaded stick ends for ultra-precise control and durability.

• Dual 2.4GHz ExpressLRS (Gemini): Dual SX1281 transceivers provide robust Gemini signal redundancy and support up to F1000 update rates.

• 3.5" High-Brightness Touchscreen: 480 × 320 IPS display with 262K colors and up to 600 nits brightness for clear outdoor readability.

• Carbon-Look Shell & CNC Controls: Styled with a premium carbon-look finish, paired with CNC aluminum control buttons and a precision scroll wheel.

• Integrated 2.4GHz Antenna: Compact, durable internal antenna design ensuring consistent signal strength and transmission stability.

• Efficient Active Cooling: Low-noise cooling fan paired with aluminum heat sinks maintains stable RF output under demanding conditions.

• Built-in Motion Sensor: Integrated gyroscope enables tilt-based control inputs for switches, gimbals, and telemetry functions.

• Interchangeable Shoulder Switches: Configurable control layout with easily replaceable switch modules.

• Dual Storage & Expansion Options: Built-in flash memory with external MicroSD support (up to 32GB/FAT32), built-in microphone reserved for future features, and a JR-compatible external module bay.

Technical Specifications

• Brand / Manufacturer: RadioMaster

• Model Name: GX15 MAX ELRS Gemini

• Part / SKU Number: BR0157.0136-MAX-CHA

• Color / Shell Finish: Black Gimbals & Buttons (Charcoal Transparent Shell)

• Processor: STM32 H7 Processor

• Operating System / Firmware: EdgeTX (Requires version 2.12.0 or higher)

• Display: 3.5-inch IPS Touchscreen (480 x 320 Resolution, 262K Colors, up to 600 Nits Brightness)

• Internal RF System: ExpressLRS 2.4GHz (Dual SX1281 Transceivers / Gemini Support)

• Frequency: 2.400GHz

• Update Rate Support: Supports up to F1000 operation with compatible receiver systems

• Antenna Configuration: Integrated 2.4GHz Antenna

• Gimbals: AG02 CNC Aluminum Hall Sensor Gimbals

• Gimbal Stick Threads: M4

• Control Hardware: CNC Aluminum Buttons and Precision Scroll Wheel

• Channel Count: Maximum 16 Channels (Receiver dependent)

• Motion Sensor: Built-in Gyroscope (Tilt-based control inputs)

• Audio Hardware: Built-in Microphone (Reserved for future feature expansion)

• Cooling System: Low-noise cooling fan with aluminum heat sinks

• Switches: Interchangeable shoulder switch modules

• Onboard Storage: Built-in Flash Storage

• External Storage: MicroSD Card Slot (Supports up to 32GB / FAT32; inserting a MicroSD card disables internal flash memory; card not included)

• External Module Expansion: JR-Compatible Module Bay

• Operating Voltage: 6.6V – 8.4V DC

• Current Draw: 850mA (at max output power)

• Battery Support: 7.4V 2-cell LiPo, Two 3.7V 18650 Li-Ion cells, or 21700 5000mAh Battery Pack (Batteries not included)

• Power Management: Intelligent Battery Management System

• Connectivity & Charging: USB-C

• Firmware Update Method: USB-C (UF2)

• Dimensions: 178 mm x 168 mm x 81 mm

• Weight: 725 grams (without battery)