The PURPLE button opener two choices, the TX2028 or get the 888LM and the 956EV/EVC off ebay, I will be selling my TX2028 as I got the other two which work too. The TX2028 pairs with the purple button, the 888LM pairs with the 888LM controller. - call tech support to confirm, but I am using all these with no problem. Check prices as Chamberlain has the highest prices. I also have the older controllers which do not work with the newer openers. Do not know about the red/orange button.