Transmitter power
Rated power of the transmitter installed in the controller. This is an important parameter for ensuring reliable control of the RC model at a distance. The power of the transmitter is measured in milliwatts (mW), and the higher the number, the further the signal reaches and the more reliable control will be over long distances or in conditions of interference. In professional models of remote controls, the transmitter power can exceed 1000 mW (1 W).
Range
The operating range of the transmitter in the control panel, in other words, is the maximum distance that the RC model can move away from the transmitter without losing control. The greater this distance, the more convenient it is to operate the car, but at the same time, powerful “long-range” transmitters have corresponding dimensions, weight and cost. In practice, the range may be less than stated - for example, due to the presence of obstacles in the signal path or due to weak batteries. Therefore, it is best to choose according to this parameter with some reserve.
Built-in speaker
The presence of
a built-in speaker in the controller design.
The specific implementation of this function varies depending on the device itself. In its simplest form, the speaker provides audible warnings about low battery charge, loss of connection with the model, and other problems. The built-in speaker can also play sound effects to confirm the completion of certain actions or commands. And in the most advanced implementations, the speaker is used to provide voice alerts.
HDMI output
HDMI is a digital interface specifically designed for transmitting high-definition video and multi-channel audio. If there is
an HDMI output, the controller can be connected to a TV, monitor or other device to display the image from the RU-model camera on a large screen. The convenience of HDMI lies in the fact that almost all modern video equipment that supports HD standards is equipped with such inputs.
Note that remote controls can be equipped with a smaller version of the connector - miniHDMI or microHDMI. However, finding an adapter cable is usually not a problem; it is often supplied as standard.
Operating time
Time of continuous operation of the controller without recharging the battery or replacing batteries. When choosing based on this indicator, it is worth considering that it is quite approximate. In practice, operating time strongly depends on the intensity of use of the remote control, and in models powered by replaceable batteries, also on the quality of these elements. Actual autonomy can often be less, and sometimes even more, than declared. However, different models of controllers can be compared based on the operating time on one full charge given in the specifications.
