The Home RTX user manual instructs me to press and hold the TX button for several seconds, then to release it to engage TX pairing mode. I am unable to get my RTX to go into TX pairing mode using these instructions. Why?

The new procedure for getting your Miccus Home RTX into TX pairing mode is to double press the TX button quickly (press and release the TX button two times quickly). When in pairing mode the RTX indicator lights should be blinking quickly between red and blue. The Home RTX manual will be corrected upon next printing.