This coupon unlocks Preset Slots. They let you save and load item sets! Here are examples of how to use the new commands:
@itemset save 1 Saves your current equipment (armor, gear, skill packs, etc.) as item set 1
@itemset 1 Automatically searches your inventory, stash, elite stash, and currently loaded extra stash for the items in item set 1, and equips them if they are all found.
@itemset name 1 Standard Assigns the name "Standard" to item set 1
@itemset names Displays a list of your saved item sets and their names
For all of these commands, @set can be used as a shortcut, instead of @itemset. You can purchase up to 5 presets!