Radiomaster TX15 – green ELRS radio controller for FPV and RC models

Radiomaster TX15 Radio Controller (M2) ELRS / Green is a configurable transmitter for FPV drones and other RC models equipped with a compatible receiver. RadioMaster names this green finish Mint Mist. Mode 2 places throttle control on the left stick. Built-in ExpressLRS, EdgeTX firmware and V5.0 Hall sensor gimbals suit users who want to adapt model settings and control functions to their equipment.

ExpressLRS on two selectable frequency bands

An internal transceiver based on Semtech LR1121 supports ExpressLRS on either 2.4 GHz or the sub-GHz 900 MHz band. A receiver must match the selected frequency band and protocol. Up to 16 control channels are supported, with the actual available channel count depending on the receiver. A JR-compatible module bay accommodates an additional external transmitter module.

Transmit power is adjustable, and RadioMaster specifies antenna gain of 2 dB. The antenna folds for storage and transport. A fan and aluminum heat sink cool the radio system.

Hall sensor gimbals and interchangeable shoulder switches

This standard Radiomaster TX15 uses V5.0 Hall sensor gimbals. Stick ends have an M4 thread, allowing compatible threaded replacements to be fitted. Included high-tension springs provide an option for changing stick resistance.

Shoulder buttons can be replaced with the supplied short switch assemblies, choosing between a two-position latching switch and a momentary switch. An integrated ICM-42607-C motion sensor supports TiltX and TiltY functions. These allow radio tilt to be assigned to actions such as switching, camera positioning or triggering a telemetry callout.

Touchscreen, EdgeTX and storage options

A 3.5-inch IPS touchscreen offers 480 × 320 resolution and a manufacturer-specified brightness of 600 nits. An STM32 H7 processor runs EdgeTX, supporting model-specific configurations and Lua scripts. Internal RF module firmware is ExpressLRS. USB-C supports simulator connectivity and firmware updates using the UF2 method.

Built-in flash stores models, scripts, sounds and themes. Alternatively, a 32 GB FAT32 microSD card can be used. Inserting a card disables onboard flash, so these storage options are not used simultaneously. A microSD card is not included. RadioMaster reserves the built-in microphone for future feature expansion.

Power and portability

Operating voltage is 6.6–8.4 V DC, with current consumption of 875 mA at maximum transmit power. Power options include a 7.4 V two-cell LiPo battery or two 3.7 V 18650 Li-ion cells. RadioMaster also lists a compatible 21700 5000 mAh battery option. Batteries must be purchased separately. USB-C charging and a battery balancing circuit are built in.

Dimensions are 178 × 168 × 81 mm, and weight without a battery is 605 g. Included equipment comprises a Signature carry case, an 18650 battery tray, a USB-C cable, a screen protector and accessories for customizing gimbals and shoulder switches. Controlling a model also requires batteries, a suitable receiver and a correctly configured radio link.

See our full range of FPV controllers here.