If no one plays with the settings

In practice, this is impossible. It only has one rotary knob
which services at least ten pages of functions - only one of
which is volume. The first time one turns on the glider power the
vario will scream . . a punter will reach for the vario's
'volume' knob, give it a twist, no matter what page it is on,
etc, etc. To make it worse, the way to change pages is to press
the knob - and this function was faulty on the new unit that I
have used . . . Of course the 'double-click' to get back to the
'home' page failed as well . . .

Not a good device unless *all* pilots are prepared to learn how
to use it properly, which includes not 'fiddling' (and you get a
good unit).

Jim Kelly