That is a neat tamb! Meinl makes great stuff.
In all the mountable tambs I have seen, the mounting bracket cannot be removed, but it looks like this one can. It appears to be a handheld tamb with a mounting bracket bolted to it. I think you can remove it with a wrench - not something to do between sets, but it looks to be fairly easily convertible. I wonder what is up with the triangular jingles?