I'm pretty sure if you buy a new module, you'll only get the black one which can be used in both new and old controllers. I ordered a Pro-C and an expansion module last week from Sprinkler Warehouse and I received the new black module. The following is cut from a Hunter product info. page on the Pro-C "Improved Module Design. Expansion modules are now able to operate with the new Power-Lock slide feature. The PCM-900 has been redesigned so it can only be installed in its proper position (the upp...
