RadioMaster MT12 ELRS transmitter + ER3C-I receiver

Surface Radio Controller RadioMaster MT12 ELRS + ER3C-I

The RadioMaster MT12 is an open-source surface radio supported by EdgeTX, ExpressLRS, and the Multi-module project. Featuring 10 physical inputs and up to 16 or 32 channels, it is designed for cars, trucks, boats, and other surface models with high customizability.

Features

• Built-in ExpressLRS Backpack or 4in1 MPM RF modules
• STM32F407VGT6 processor with 1MB Flash and preinstalled EdgeTX firmware
• QC3.0 fast charging (2.0A MAX) via USB-C
• Ergonomic compact design with oversized battery compartment (2 x 18650 or 2S 5000mAh, not included)
• Standard Nano module compartment, rotatable antenna, and customizable switches or 4-way joystick

Specifications (MT12)

• Dimensions & Weight: 177.8 x 118.4 x 207.8 mm; 480g
• Frequency & RF: 2.400GHz – 2.480GHz; Internal 4-in-1 or ELRS 2.4GHz
• System & Display: EdgeTX OS; 128 x 64 Monochrome LCD; Hall-effect wheel and trigger sensor
• Power: DC 6.6 – 8.4V; USB or SD card firmware upgrades; Nano size module bay

Specifications (ER3C-i Receiver)

• Power & Protocol: DC 4.5 – 8.4V; ExpressLRS 3.3.0 pre-installed
• Design: Built-in ceramic antenna; 3CH PWM output; 10mW telemetry power
• Dimensions & Weight: 26.1 x 18.5 x 13.0 mm; 4.2 grams; Battery detection DC 4.0 – 35V

Package Includes

• MT12 Surface Radio (ELRS Version) & ER3C-i 2.4GHz ELRS PWM Receiver
• Dual Switch Expansion module & 4-Way Joystick Expansion module
• Nano Adapter, USB-C Cable, Leather Lanyard, and custom carry case
• 18650 Battery Tray, Screen Protector, Stickers, and Manual