Couldn't tell you how it works because I've never seen it done. The company I
got them from swears that they'll do 132 channels, but all I've ever seen a top
display do is 48 myself! Maybe it's something with the buttons as zone
selectors or something - I haven't got a clue. Or maybe I just got bad info.
Wouldn't be the first time it happened. Anyway, anyone interested, they're
brand new radios!

Thomas