Hey,
First off it isn't available for salw anymore.
You cannot see the display nor change channels without opening the shell. There's no real screws, it's very easy to open it. You only remove the lower plastic cover by pushing it in and draging it down. Takes two seconds to do.
It is solid and are sturdy enough to use when crawling in mud and stuff.
About range, that's something you can't say because it depends on alot off factors such as what kind of channel you use, weather, how high up the antenna is and so on. I normally use my Thales whip antenna for longer distant communication.
Cheers.
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