I was browsing through the achivements last night and noticed this one here which is a little anbiguous:

"Defeat Algalon the Observer on Normal Difficulty without anyone in the raid wearing any equipment with an item level higher than 226. "

Now i know that each item has it`s own level based on the amount of stats it has or something like that but what i find it really really awkward is that there is no way to tell what level each item has (that i know of) in game.
I know that there are several unofficial websites that give information about this game but i don't know why blizzard is making this achivement reliant on such websites.
What am i supposed to do for this? check a website for each item i have to see if it`s not higher than 226?
I think the best course of action would be to implement an option to show the level of each item. (if there is one atm i'd like to know)