Limited edition of DC/DS-24




We would like to introduce you a special limited edition of ten DC/DS-24 transmitters, which was created for the 75th anniversary of the end of World War II. Unfortunately, the release of this series last year was significantly affected by a global pandemic, which also affected our plans. The limited edition is intended for end customers, collectors and fans of JETI and is created in the spirit of flying legends of World War II. Each transmitter has original design, which was artistically painted directly on the transmitter (Airbrush).

You can find more information and photos on our Facebook profile JETI Model.




Two updates have been released via JETI Studio.




1.    REX Assist v1.19 (03/2021)
Airplane pitch with Assist enabled is no longer affected by acceleration (Horizon mode).

2.    MVario2 FAI F5J v2.05 (03/2021)
Supports new sensor revision.

Central Box update v1.10
New version of SW v1.10 intended for Central Box 210/220.

-Time interval of the RX alarm was modified to 2s.
-Extension the compatibility for Futaba R7008SB (S.BUS)

The update can be done by the Jeti Studio.

MVario2 EX

Art. No.: 
EAN: 8595245909086
MVario2 EX
Weight [g] 5
Dimensions [mm] 35 x 16 x 7
Operational temperature [°C] -10 ... 85
Supply Voltage [V] 3.5 ... 8,4
Average Current [mA] 15

Files for download

Manuals - MVario2 EX

ERES_manual_[CZ] - Czech User Manual
ERES_manual_[DE] - German User Manual
ERES_manual_[EN] - English User Manual
MVario2 EX: Manual [CZ] - Czech User Manual
MVario2 EX: Manual [DE] - German User Manual
MVario2 EX: Manual [EN] - English User Manual
MVario2 EX: JETIBOX Scheme [EN, DE] - JETIBOX screen schemes of the MVario2

Update - MVario2 EX

MVARIO2 EX V1.08, MSPEED EX V2.04 - Firmware update for sensors. Standard firmware package (12/2015).
MVARIO2 F5J V.F1.03 - Firmware package for official FAI F5J competitions. Instructions included.

CIAM FAI protocols - MVario2 EX

AMRT MVario2 - JETIBOX - CIAM FAI approval document
AMRT MVario2 - JETIBOX mini - CIAM FAI approval document
Test results of the CIAM FAI, EDIC working group, firmware version F1.03 - MVario2 accuracy compared to a calibrated altimeter

MVario2 EX is a system that measures atmospheric pressure and using the obtained data it calculates the altitude above sea level, airspeed, and the rate of climb as well as the rate of descent. Changes in climb and descent rates are signaled as well. The sensor also alerts you if any alarm setting is exceeded. The sensor data can also be transmitted via the Duplex system to the user.


Main features

  • Measurement of altitude, pressure, and temperature.
  • Very accurate and fast indication of climb and descent.
  • Possible sound alarm signaling using a JETI Tx module (EU only) or JETIBOX profi.
  • Possibility to be used as an Expander and to connect other sensors.
  • Adjustable compensation of energy (TEK) via MSPEED EX sensor.
  • Possibility to be used as an altitude switch in FAI F5J or ALES competition categories.
  • The device is compatible with EX Bus protocol, i.e. it is possible to be configured comfortably via a special menu in DC/DS JETI model transmitters.
  • Firmware updates.

Technical data


Resolution of measured height


Typical noise ratio in height changes measurement


Measurement range


The Duplex system takes advantage of the 2.4GHz band for communication. This system not only transmits control data to the model but also sends data from the model back to the transmitter. The telemetry data collected during operation is shown as actual, measured values in real time on either LCD screen of a connected JETIBOX or on the DC/DS JETI model transmitters.





Example of connection to the receiver as an Expander

Due to its flexibility, the MVario2 EX allows connection of up to two additional sensors. MVario2 then acts as an Expander and sends its own telemetry to the receiver together with the telemetry of connected sensors. You can connect eg speedometer MSPEED EX for the speed compensation (TEK) or any other sensor to any port (Ext1 or Ext2).

For the MSPEED EX sensor, a firmware update in the Files for download section is available, which improves the properties usable by the MVario2 total energy compensation of the model (the update offers increased refresh rate of indicated airspeed).




Example of installation with F5J Limiter or ALES Limiter functions enabled.

If you participate in  competitions in categories such as F5J or ALES (Altitude Limited Electric Soaring), set the appropriate device mode (F5J/ALES) in the MVario2 menu. Next, connect the receiver and the speed controller (ESC) as shown. The standard firmware allows you to set the cut-off height and the maximum time of motor operation.

As an alternative to the standard firmware, there is a special version certified for official competitions of FAI F5J category, which can be found in the Files for download section. During the competition you must have installed exactly this version. To read the initial altitude ('Start Height'), use a JETIBOX or a JETIBOX mini after landing.




Comparison of the Start Height values measured by a calibrated altimeter and the MVario2 EX sensor. The graph was created on the basis of tests made by the EDIC workgroup at the CIAM FAI.

Test results of the CIAM FAI, EDIC working group, version F1.03 



Example of connection with telemetry logical inputs enabled.

MVario2 EX can be configured as a sensor of logic levels (log. 0 or log. 1). If you want to be informed eg  whether the landing gear  is properly secured, the logic inputs function is very convenient. Simply connect the limit switch as shown - between the signal wire and the ground (minus) - this way you will know immediately whether the switch is on or off.


MVARIO2 - Log.Input

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