• SKU:

The EWRF e709TM3 PRO edition  features packed video transmitter now fitted with a built in microphone ; a 48channel VTx with wide input DC voltage range and selectable transmitting power of 25mW, 200mW, 500 mW and Pitmode (Off), new PCB design with breakoff tabs for smaller and tighter frames, this VTx will fit most flying requirements.

  • Clean powerup reduces interfering with other flyers
  • Pitmode reduces transmitting range to <2m allowing you to power your craft for pit work without interfering with other flyers in the air.
  • The Betaflight OSD support makes for fast and easy changing of channels, bands and power
  • Radios running OpenTX will have the ability to change VTx setting from their radio (LUA script and SPort/FPort enabled receivers required)
  • Connection options of solder pads or JST connector
  • An integrated 5v DC output BEC simplifies FPV cam connection and improves FPV feed quality.
  • Lower current consumption create less heat (compared to standard e709)
  • Additional thermal protection circuitry minimise the risk of damage from overheat or antenna disconnection.

EWRF e709TM3 Pro (with Mic) 5.8G 48CH 25mW 200mW 500mW FPV VTx with OSD and Smart Audio support Total Rotor


Frequency 5.8Ghz (5362 to 5945 Mhz)
Channels 48 channels (consistent power output)
Input DC supply 7 to 26 v
Output DC supply 5v (500mA)
Current Consumption @12v DC

25mW-90mA, 200mW-130mA, 500mW- 220mA

Transmission Power (selectable) 25mW/200mW/500mW/Pitmode
Channel/Band/Power Settings

Betaflight OSD, Lua Script, PWM (channel & pitmode), button on VTx

Antenna Connection MMCX to SMA connector pigtail
Protection Feature

minimise risk of damage from antenna disconnection or overheating

Dimension 36mm x 36mm x 4.8 mm (with breakoff tabs)
Weight 4.2g (without antenna)
Package include 1 x EWRF e709 Pro, 1 x connection harness, 1 x antenna connection pigtail

Notes : 

  • It is your responsibility to ensure that your use of EWRC products or any radio transmitting device conforms to your local regulation on radio transmitting power and frequency usage laws. Be responsible and considerate, higher transmitting power means more RX issues, a higher gain receiving antenna is better than higher transmitting power
  • Ensure that antenna is connected before powering up VTX
  • VTx must be mounted in a location with sufficient airflow



Through a  available  UART (TX pin) on flight controller

-Betaflight 3.1 or later firmware required Click here for setup manual

-For Frsky transmitters install Open TX LUA script to enable Vtx control via transmitter

-Changing of transmitting power, bands, channels and pitmode (selections are Betaflight dependent)

Band F is not available if OSD wire is connected

Settings and LED indication - In normal operations both red and blue LED are lit. At initial power up, the LEDs will cycle once through the preset parameters and values

  • The red LED indicates parameter state , CHANNEL, BAND or POWER, of the VTX , press and hold to cycle through the parameters accordingly

-1 flash : channel select

-2 flashes : band select

-3 flashes : transmitting power levels select

  • The blue LED indicates the working value/setting of the VTX, each press of the button will cycle through the respective available value/settings within the respective parameter of CHANNEL, BAND or POWER

-Channel (1-8) indication if 3 flashes means channel 3

-Band (A-F) Indication if 3 flashes means Band C.

-Power levels (25mW, 200mW, 500mW) 3 flashes means is at 3rd level of transmitting power level i.e at 500mW

  • Finally, to save and exit settings of VTX, press and hold the button till the indicators LEDs are steady

Pitmode- If the red LED is on and blue LED is off,  the Vtx is in pit mode (press button twice rapidly to enter or exit Pitmode)

Thermal Protection - Flashing  green LED indicates that the VTX had entered overheat protection mode and the transmitting power level will be reduced. Disconnect power and wait for a few minutes for Vtx to cool down, check that antenna is connected and secured, avoiding  leaving the Vtx in a powered state without airflow.

TR Tip

Often our quad sits powered up waiting for the other pilots to be ready or we may be adjusting some settings, this non-flight with no airflow over the Vtx causes heat to build up especially with most of us running 200mW or more, this could cause some Vtxs to “burn up”. For those using Vtx with TBS SA or IRC Tramp Vtx control capability, there is a setting in Betaflight FW from version 3.00 onwards, that will put the Vtx in a low power state (25mW) when a quad is disarmed and revert to your preset when armed.

In CLI type

-Type “Set vtx_low_power_disarm = ON

-Hit “ENTER” key

-Type “save

Disconnect from Betaflight configurator, test and check your Vtx display to see that the “power” changes between arm and disarms state