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RADIOMASTER MT12 ELRS FCC Surface Transmitter w/ER3C-i Receiver

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RADIOMASTER MT12 ELRS FCC Surface Transmitter w/ER3C-i Receiver


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The RADIOMASTER MT12 is a pioneering open-source surface radio, and the first surface radio officially supported by the EdgeTX and ExpressLRS multi-module project. The MT12 is available as either an ELRS or 4-in-1 multi-module version (see specs) and boasts 10 physical inputs, and the capability to handle either 16 or 32 channels (4-in-1 version only). The ELRS (ExpressLRS) version is designed to provide a reliable long-range, ultra-fast response, super low latency, and high refresh rates. ELRS is a revolutionary open-source protocol taking the R/C industry by storm. Each version is also available in either an FCC version or a European LBT version, please check the specifications below for the supported protocol.

The EdgeTX system is preinstalled and the MT12 has cutting-edge software fit for its class-leading hardware. RADIOMASTER works closely with the EdgeTX team to develop new features and optimize the user experience for surface models. RADIOMASTER will also continue to contribute and support projects like EdgeTX, ensuring the concepts of open standards are carried forward, for more information, please visit

Just a few of the features of the MT12 include a standardized button layout and CNC menu wheel, adjustable throttle trigger to suit your driving style, adjustable wheel tension, Hall sensors for accurate inputs and precise centering, 5 trim buttons, and an external NANO module. Included with the transmitter is an ER3C-i receiver that also utilizes the revolutionary ExpressLRS system, for high reliability, ultra-fast response speeds, and an ultra-long receiving range. It can drive up to 3 servos, has built-in receiver voltage telemetry, and a built-in, highly sensitive ceramic antenna.

The MT12 is primed for a wide array of surface models, from cars and trucks to boats and much more. Featuring extensive customizability and a versatile operating system, the MT12 stands out as a highly configurable surface radio, prepared to excel in virtually any scenario.

• Available with either a built-in ExpressLRS or 4-in-1 MPM internal RF modules (see specs for details)
• Preinstalled EdgeTX firmware
• Compact design with excellent ergonomics
• Large battery compartment, will accept either 2 x 18650 cells or a 2s 5000mah battery pack (batteries not included)
• Standard NANO module compartment
• RADIOMASTER standardized button layout
• Rotatable antenna

Specs (MT12 Transmitter):
Type: RADIOMASTER MT12 ELRS FCC Surface Transmitter
Operating frequency: 2.400GHz-2.480GHz
Compliant Protocol: FCC
Internal RF Protocol: ELRS 2.4GHz
Supported Protocols: External module dependent
Operational current: 320mA (ELRS)
Operational voltage: 6.6-8.4V DC
Operating system: EdgeTX
Control channels: 16
Display: 128x64 Monochrome LCD
Recommended Battery: 2 x 18650 cells or 2s 7.4v 5000mah battery pack (batteries not included)
Charging: Built-in USB-C charging
Firmware Upgrade method: Via USB or SD card
Wheel and Trigger Sensors: Hall-effect
External Module Bay: NANO size (suits RADIOMASTER Ranger Nano Module/RADIOMASTER RM 4-in-1 module/TBS Crossfire NANO modules)
Dimensions: 177.8x118.4x207.8mm
Weight: 480g

Specs (ER3C-i Receiver):
Type: ER3C-i 2.4GHz ELRS PWM Receiver
Operating frequency: 2.400GHz-2.480GHz
Compliant Protocol: FCC
Input Voltage: 4.5~8.4V DC
Antenna Type: Built-in high-sensitivity ceramic
Wireless Protocol: Preinstalled ExpressLRS 3.3.0
Output Channels: 3 PWM
Telemetry power: 10mW
Battery voltage detection range: 4.0~35V DC
Dimensions: 26.1x18.5x13.0mm
Weight: 4.2g
Firmware: Device Category: Radiomaster 2.4Ghz/Device: RadioMaster ER3C-i

1 x RADIOMASTER MT12 ELRS FCC surface transmitter
1 x ER3C-i 2.4GHz FCC LBT PWM surface receiver
1 x Dual switch expansion module
1 x 4-way joystick expansion module
1 x Nano adapter
1 x USB-C cable
1 x Leather lanyard
1 x Custom RADIOMASTER carry case
1 x 18650 battery tray
1 x Screen protector
1 x Sticker set
1 x Manual

Please note: A copy of the User Manual is available under the "Manual/Files" tab.

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RADIOMASTER MT12 Surface Radio User Manual Download [1]
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