RadioMaster GX15 ELRS LBT Radio Controller

Keep your telemetry above your thumbs. The GX15 puts its 3.5-inch touchscreen at the top of a full-size radio, where your hands are less likely to hide the timer just as the landing circuit gets interesting. Built around EdgeTX, an STM32 H7 processor and dual 2.4GHz ExpressLRS Gemini hardware, it is aimed at fixed-wing, glider and helicopter pilots who want plenty of physical controls alongside a modern radio link.

Choose White, Blue, Yellow, Red or Green. These are the standard GX15 LBT versions with V6 Hall-effect gimbals, not the AG02-equipped GX15 MAX.

Key Highlights

• Screen above the sticks: A 480 x 320 IPS touchscreen with up to 600 nits brightness keeps setup pages and flight information in a practical position.
• Gemini 2.4GHz hardware: Dual SX1281 transceivers and integrated antennas with different orientations support link redundancy with a compatible receiver.
• Adjust the feel: V6 Hall-effect gimbals offer horizontal and vertical travel adjustment, with M4 stick threads for compatible stick ends.
• Controls for proper model setups: Sliders, trims, dials and interchangeable shoulder switch modules give you options for the jobs that deserve a dedicated control.
• One USB-C connection: Charge the radio, connect to a simulator, transfer data or update firmware without collecting a drawer of different leads.

Why You Want It

If your models need more than an arm switch and a throttle stick, the GX15 gives you room to build a control layout that makes sense. Use the physical sliders and switches for model functions, keep telemetry on the top screen, and configure the motion sensor for extra tilt-based inputs where useful. The H7 processor handles EdgeTX and scripts, while the carry case helps keep the radio together between flying sessions. You still have to remember where you put the car keys.

Specifications

• Model: RadioMaster GX15 standard, ExpressLRS LBT; White, Blue, Yellow, Red or Green
• Internal RF: 2.4GHz ExpressLRS with dual Semtech SX1281 transceivers and Gemini support
• Antennas: Integrated horizontal and vertical 2.4GHz antennas
• Channels: Up to 16, receiver dependent
• Processor: STM32 H7
• Radio firmware: EdgeTX, requiring version 2.12.0 or later
• Display: 3.5-inch IPS touchscreen, 480 x 320 resolution, 262K colours, up to 600 nits
• Gimbals: V6 Hall-effect; M4 stick threads; vertical and horizontal travel adjustment
• Controls: Six trims, six-position button bank, two front dials, two rear sliders and eight switches
• Expansion: JR-compatible external module bay; DSC trainer port and headphone jack
• Power input: 6.6-8.4V DC
• Battery options: 7.4V 2S LiPo pack or two suitable 3.7V 18650 Li-ion cells; batteries not included
• USB-C: Charging, simulator connection, data transfer and UF2 firmware updates
• Storage: 512MB onboard flash; 32GB FAT32 microSD supported, card not included. Inserting a card disables onboard flash
• Other hardware: Cooling fan and aluminium heatsinks, built-in motion sensor, microphone reserved for future expansion

FAQ

Is this the GX15 MAX?

No. This is the standard GX15 with V6 Hall-effect gimbals. The MAX is a separate version with AG02 CNC gimbals and premium aluminium controls.

Which receivers can I use?

Use a compatible 2.4GHz ExpressLRS receiver. The transmitter and receiver must use compatible firmware major versions and regulatory settings. Gemini needs a receiver that supports it; packet-rate choices also depend on the receiver and regional firmware.

Does it come with batteries?

No. The 18650 tray is included, but the cells are not. Use suitable unprotected button-top 18650 cells as specified by RadioMaster, or a compatible 7.4V 2S LiPo pack. Check polarity and battery suitability before charging.

Do I need a memory card?

The radio has 512MB of onboard flash. A 32GB FAT32 microSD card is optional and supplied separately; inserting one disables the onboard flash storage.

Can I use it for simulator practice?

Yes, the USB-C interface supports simulator connectivity as well as charging and data transfer. Check your simulator's controller setup before practising that first low pass over the virtual pits.

What's in the Box*

• 1 x GX15 radio controller in your selected colour
• 1 x GX15 Signature carry case
• 1 x 18650 battery tray
• 2 x replacement shoulder panels
• 1 x USB Type-C cable
• 1 x screen protector
• 1 x 1.5mm hex wrench
• 4 x low-tension gimbal springs
• 2 x gimbal stick set screws
• 4 x 6mm switch-delete grommets
• 1 x lanyard
• 1 x RadioMaster sticker set
• 1 x GX15 manual
• 1 x inventory card

*Batteries and microSD card are not included.

Disclaimer

Use the LBT regulatory configuration and power settings permitted where you fly. Receiver compatibility and correct model setup remain essential; test failsafe operation and remove propellers before bench configuration. Charge only compatible batteries, never leave charging unattended, and keep the charging area clear of combustible materials. The built-in microphone is reserved for future expansion, not a promised working voice-control feature.

Still Here?

Pick your colour and give those model memories a radio with the controls to match. Add the GX15 to your kit, then sort a suitable battery before heading to the field.