The RadioMaster MT12 is a pioneering open-source surface radio, and the first surface radio officially supported by EdgeTX, ExpressLRS, and the Multi-module project. Boasting 10 physical inputs and the capability to handle either 16 or 32 channels*, the MT12 is primed for a wide array of surface models, from cars and trucks to boats and beyond. 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.

Features
Available with Built-in ExpressLRS Backpack or 4in1 MPM RF modules
Featuring a powerful STM32F407VGT6 with 1MB Flash
Preinstalled EdgeTX firmware
QC3.0 fast charging supporting 2.0A MAX
Compact design with excellent ergonomics
Oversized battery compartment – 2 x 18650 cells or a 2s 7.4v 5000mah battery pack (Batteries not included)
Standard Nano module compartment
RadioMaster standardized button layout
Rotatable antenna
Customizable base switches or 4 way joystick included

Specification MT12
Item: MT12 Surface Radio
Physical dimensions: 177.8*118.4*207.8mm
Weight: 480 grams
Operating frequency: 2.400GHz-2.480GHz
Internal RF Options: 4-in-1 multi-protocol / ELRS 2.4GHz
Supported protocols: Module dependent
Operational current: 160mA for 4in1 / 320mA for ELRS
Operational voltage: DC 6.6-8.4V
Operating system: EdgeTX
Control channels: 16 as standard, ability for expansion 32 Channels (4in1 only)
Display: 128*64 Monochrome LCD
Battery: 2 x 18650 cells or a 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 sensor: Hall-effect
Module bay: Nano size (RadioMaster Ranger Nano Module / RadioMaster RM 4in1 module / TBS Crossfire Nano module)

*32 channels requires a 4in1 radio and additional 4in1 RF module along with compatible receivers

Specification ER3C-i (Included with ExpressLRS version)
Item: ER3C-i 2.4GHz ELRS PWM Receiver
Power supply: DC 4.5 – 8.4V
Antenna type: Built-in high-sensitivity ceramic antenna
Wireless protocol: ExpressLRS 3.3.0 pre-installed
Output channel: 3CH PWM
Telemetry power: 10mW
Battery voltage detection range: DC 4.0 – 35V
Weight: 4.2 grams
Dimensions: 26.1*18.5*13.0 mm
Firmware: Device Category: Radiomaster 2.4Ghz / Device: RadioMaster ER3C-i

Specification R85C (Included with 4in1 version)
Item: R85C Receiver
Power supply: DC 4.5 – 8.4V
Frequency range: 2400-2483.5Mhz
Support protocol: D8/D16/SFHSS
Output channel: 5CH PWM
Antenna type: high-sensitivity 2.4G antenna
Telemetry power: 100mw / 20dbm
Weight: 5.7 grams
Dimensions: 31.0*18.5*13.0 mm

Package Includes
1 * MT12 Surface Radio ExpressLRS Version
1 * ER3C-i 2.4GHz ELRS PWM Receiver
1 * Dual Switch Expansion module
1 * 4 Way Joystick Expansion module
1 * Nano Adapter
1 * USB-C Cable
1 * Leather Lanyard
1 * Custom RadioMaster signature carry case
1 * 18650 Battery Tray
1 * Screen Protector
1 * Stickers
1 * Manual
OR

1 * MT12 Surface Radio 4in1 Version
1 * R85C Receiver
1 * Dual Switch Expansion module
1 * 4 Way Joystick Expansion module
1 * Nano Adapter
1 * USB-C Cable
1 * Leather Lanyard
1 * Custom RadioMaster signature carry case
1 * 18650 Battery Tray
1 * Screen Protector
1 * Stickers
1 * Manual

MT12 is now compatible with mLRS!

The mLRS project offers an open-source, high-performance radio system based on LoRa technology, operating at 2.4 GHz, 915/868 MHz, and 433 MHz/70 cm, designed to deliver a secure, reliable, and robust link under any conditions.
mLRS is designed with MAVLink and MSP optimization in mind, while also providing a transparent serial link, making it suitable for a wide range of applications. Its design ensures the strongest possible signal integrity while maintaining a relatively high data rate, balancing performance and reliability without compromise.