RadioMaster MT12 Surface Radio Controller ExpressLRS + ER3C-I Receiver

• 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

ExpressLRS Package