Radio Transmitter RadioMaster MT12 Surface Radio Controller FCC

The RadioMaster MT12 is a pioneering open-source surface radio transmitter, making history as the first surface controller officially supported by EdgeTX, ExpressLRS, and the Multi-module project. Featuring 10 physical inputs and the capability to handle up to 16 or 32 channels, the MT12 is fully prepared for a massive range of surface models, from RC cars and trucks to boats and beyond. Thanks to its extensive customization options and a highly versatile operating system, the MT12 stands out as a highly configurable surface transmitter ready to excel in virtually any operating scenario.

Features

Pioneering open-source surface radio officially built for EdgeTX, ExpressLRS, and Multi-protocol systems.

Equipped with 10 physical inputs to manage complex functions on cars, trucks, tanks, or marine models.

High-precision Hall-effect sensors utilized for both the steering wheel and throttle trigger to ensure smooth, wear-free inputs.

Standard Nano-sized module bay allowing quick installation of external modules like the Ranger Nano, RM 4-in-1, or TBS Crossfire Nano.

Modular expansion design allowing you to hot-swap between a dual-switch module or a 4-way joystick for custom control layouts.

Integrated high-speed USB-C charging with support for QC3.0 up to 2.0A maximum current.

Specifications

Model: MT12 Surface Radio Transmitter

Dimensions: 177.8 mm × 118.4 mm × 207.8 mm

Weight: 480 g

Operating Frequency: 2.400 GHz – 2.480 GHz

Internal RF Options: ExpressLRS 2.4GHz or 4-in-1 Multi-Protocol

Supported Protocols: Dependent on variant selected

Operating Current: 160 mA (4-in-1) / 320 mA (ELRS)

Operating Voltage: 6.6 V – 8.4 V DC

Operating System: EdgeTX

Control Channels: 16 standard (expandable up to 32 channels on 4-in-1 version)

Display: 128 × 64 Monochrome LCD

Gimbal Sensors: Hall-Effect Steering Wheel and Throttle Trigger

Expansion Bay: Nano Size Bay

Antenna Type: Rotatable High-Gain Antenna

Battery Compatibility: Dual 18650 cells or 2S 7.4V 5000mAh Li-Po (Batteries not included)

Firmware Updates: Via USB or MicroSD card

ER3C-i Receiver Specifications (Included with ExpressLRS Variant)

Model: ER3C-i 2.4GHz ELRS PWM Receiver

Power Input: 4.5 V – 8.4 V DC

Antenna Type: Built-in high-sensitivity ceramic antenna

Wireless Protocol: ExpressLRS 3.3.0 pre-installed

Output Channels: 3-Channel PWM

Telemetry Power: 10 mW

Battery Voltage Detection Range: 4.0 V – 35 V DC

Dimensions: 26.1 mm × 18.5 mm × 13.0 mm

Weight: 4.2 g

Firmware Category: RadioMaster 2.4GHz / Device: RadioMaster ER3C-i

R85C Receiver Specifications (Included with 4-in-1 Variant)

Model: R85C Multi-Protocol Receiver

Power Input: 4.5 V – 8.4 V DC

Frequency Range: 2400 MHz – 2483.5 MHz

Supported Protocols: FrSky D8 / D16, Futaba S-FHSS

Output Channels: 5-Channel PWM

Telemetry Power: 100 mW (20 dBm)

Dimensions: 31.0 mm × 18.5 mm × 13.0 mm

Weight: 5.7 g

ExpressLRS Variant Package

1 x MT12 Surface Radio (ExpressLRS Version)

1 x ER3C-i 2.4GHz ELRS PWM 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 Premium RadioMaster Carry Case

1 x 18650 Battery Tray

1 x Screen Protector

1 x RadioMaster Sticker Set

1 x User Manual

4-in-1 Multi-Protocol Variant Package

1 x MT12 Surface Radio (4-in-1 Version)

1 x R85C PWM 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 Premium RadioMaster Carry Case

1 x 18650 Battery Tray

1 x Screen Protector

1 x RadioMaster Sticker Set

1 x User Manual

Note: To access 32 channels, an internal 4-in-1 MT12 version must be paired with an additional external 4-in-1 RF module and matching compatible receivers.