User blog comment:Tommygun9504/Tommygun9504's Grenade Gazzette - March 3, 2012/@comment-4005921-20120303184622/@comment-4005921-20120303204538

For the durations of the MYST Mark II, check the page and look at the description of the picture. But, if you don't want to, then it ranges from 7 days to Permanent, no 1 days.