Zwo4 Radio

The Zwo4 transmitter was developed for function model building and is in many details very different from the systems for airplane model construction. We had the strong intention to combine a great range of functions with a simple operation in the HS12/HS16.

Don't get stuck!

The more encoders, channels and functions a radio provides, the more cumbersome and time-consuming the operation of the menu via arrow buttons, a rotary knob or mini joystick is. The softkey concept of the Zwo4 radio solves this problem: Use the 12 multifunction keys in the menu left and right next to the display. The respective key assignment is shown in the display. Additionally, four colored keys above the display are responsible for the direct request of the most important functions. We are providing templates for lots of common light systems.

The switchover between levels

All joysticks and multifunction buttons can be assigned twofold (HS12) or threefold (HS16), the switchover happens by using the two level switches. This way, the HS12/HS16 appears quite clear despite the 24/36 (3D version) provided controls.

Two is better than one

The HS12/HS16 uses two internal radio modules with differently arranged antennas. The radio chooses automatically the antenna with the optimal direction to the model - an absolutely unique feature! In combination with the CSMA/CA 'Collision Avoidance' method the 2.4 GHz band is used most efficiently.

Multiswitch -> Multibus

Instead of creating something completely new, we focused on continuity with the HS12/HS16. The Multiswitch concept for channel expansion has been prepared in function model building since decades and is mainly used to control the light systems or in case many servos are activated at the same time. The Zwo4 radio can control all systems that comply with Robbe/Futaba and Graupner/JR standards. Not left unnoticed: The 8 Multiswitch/Multibus channels are full-fledged channels including trims and all other adjustment options and can also be output of a mixer. Only the resolution and the speed of reaction are reduced. This way, max. 11+1x8 channels are provided in the HS12 and max. 14+2x8 channels in the HS16.


The most efficient radio is no good, if the handling is unclear. With the HS12/HS16 not only the servo channels, but also the controls can be individually equipped with a name that is shown in the display. With the button controls even two designations are possible for left and right, since one channel can release two different functions in function model building, e.g. horn and starter of a soundmodule. This way, even with different models (boats, trucks), there is no doubt left how the multifunction buttons are assigned.

...and flexible

Although looking inconspicuous, the HS12/HS16 sets standards with its predefined 3x24 / 4x36 mixers (3x20 / 4x30 in 2D version) in several variations (channel types). The flexible and, at the same time, surprisingly easy to operate mixer concept supports not only the hydraulic pump (or more than one) but also the complex sound modules such as the Servonaut SMB for excavators and light systems of other producers such as Pistenking, Beier or Benedini that accomodate different deflections of different functions.

Video manual for the HS12 (german)

The purchase of a HS12/HS16 is surely more than a small investment - please visit us at one of the function model fairs and see for yourself how great the HS12/HS16 works!

HS16G ohne Spur
Zwo4HS16G Radio Grey WITHOUT TYRE TRACE - Made in Germany by tematik
unverified purchases
899,00 EUR
incl. 19% tax excl. Shipping costs
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