The second letter in this case "S" would seem to indicate that it has "keyclick" which is the blue switch. The "L" that preceeds it indicates that it has lasered keycaps (as opposed to dual shot).
It also says in the description "positive click key action", which would suggest that it has tactile and clicky blues.
(if this has been said a million times on here already, sorry, I am really tired :S)