What do you mean by the “RF Curtain switch” ? This would seem to indicate that the device can “transmit” 433 Mhz signal codes and not just receive ( sense ) them.

How else would you control a curtain if you didn`t transmit a signal ?

Great device, I have 4 and am getting 2 more, but I want to now transmit signals to control other devices which
accept ( receive ) 433 Mhz RF signals.