Can multiple identical remotes be used at the same time?

Question

Do it yourself

It is planned to buy 6 identical radio-controlled cars with subsequent additional installation of sensors on them. Question: Will 6 remotes in the same room interfere with each other and interrupt the signal?

The characteristics of all remotes are similar:
Control type - radio
Frequency - 40 MHz

Answer 1

It depends on what kind of machines, if they all work on the same channel, then one remote control will control six machines, if there is at least some division into channels, inside the frequency, then they will not interfere, but this is usually only in expensive models, in general, if the machines are ordinary China then one remote control is guaranteed to control six

Answer 2

a little off topic:
> Frequency - 40 MHz,
but is this frequency allowed for RU devices in Russia?