Not sure what remote you are talking about? The two optional remotes I showed do not come with ZigBee receivers BUT the remote can work with the ZigBee receiver.
Did you have a chance to read my First Impressions review or see the videos there yet? I think I covered most of your questions.
Remember that the parts I ordered were repair parts and you don’t have to get the repair part wireless remote that comes with it. You could opt to not get it and instead use one of these other choices so the answer is:
Nope you do not need either of those remotes I showed. Those were just alternative ways to control the Zigbee receiver wirelessly. Some people like myself want to be able to mount a wall switch for control of the ZigBee receiver and not worry about misplacing the hand-held wireless remote. The thermostatic remote is just that; if you want standalone temperature control of the ceiling fan.
If you watch the video you can see it demoed. The light button does both on-off and dimming control based on whether you leave the button depressed and hold it. You can cycle the light on-off with the button and by keeping button depressed it will dim to the level until you release. The dimming will go one direction until you reach the end and then it will start going the other way.