RadioMaster GX15 ELRS, Gemini, V6 Hall Gimbals, 3.5 inch Display, Green
by RadioMaster

The RadioMaster GX15 ELRS Gemini Transmitter (Green) is a high-performance RC radio transmitter featuring a high-speed STM32 H7 processor and dual 2.4GHz ExpressLRS (Gemini) RF output powered by twin SX1281 transceivers. Capable of supporting ultra-fast update rates up to F1000 operation with compatible receiver systems, the GX15 delivers reliable signal reliability through its dual integrated horizontal and vertical internal antennas for polarization diversity without external antenna stalks.

Equipped with a bright 3.5-inch IPS touchscreen (480 x 320 resolution, 262K colors, 600 nits brightness), V6 Hall-effect sensor gimbals with M4 stick ends, and an active cooling system with a low-noise fan and aluminum heat sinks, the GX15 is engineered for demanding flight conditions. It features EdgeTX transmitter firmware (version 2.12.0 or higher required), built-in flash storage with external MicroSD card support, a built-in gyroscope for tilt-based control inputs, an integrated microphone reserved for future feature expansion, interchangeable shoulder switch modules, and a standard JR-compatible external module bay.

Key Features

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

• 3.5" Outdoor Touchscreen: 480 × 320 IPS display with 262K colors and up to 600 nits brightness for clear visibility under direct sunlight.

• Dual 2.4GHz ExpressLRS (Gemini): Dual SX1281 transceivers provide robust Gemini link reliability and support up to F1000 packet rates.

• V6 Hall-Effect Sensor Gimbals: Precision gimbals equipped with M4 stick threads for accurate and consistent stick response.

• Dual Integrated 2.4GHz Antennas: Internal horizontal and vertical antenna arrangement provides polarization diversity while maintaining a clean, antenna-free shell.

• Efficient Cooling System: Low-noise fan combined with aluminum heat sinks ensures stable RF performance under demanding conditions.

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

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

• Dual Storage Options: Onboard built-in flash memory with external MicroSD card support (up to 32GB/FAT32).

• Future-Proof Hardware: Integrated microphone reserved for future expansion, plus a standard JR-compatible external module bay.

Technical Specifications

• Brand / Manufacturer: RadioMaster

• Model Name: GX15 ELRS Dual Band Gemini

• Part / SKU Number: BR0157.0135-GRE

• Color: Green

• 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: Dual Integrated 2.4GHz Internal Antennas (Horizontal & Vertical Alignment)

• Gimbals: V6 Hall-Effect Sensor Gimbals

• Gimbal Stick Threads: M4

• Channel Count: Maximum 16 Channels (Receiver dependent)

• Motion Sensor: Built-in Gyroscope (Tilt-based control inputs for switches, gimbals, and telemetry)

• 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: 681 grams (without battery)