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2.3 Rotary knob
The SD7 rotary knob can be used by rotating left and
right to select channels or scroll through the menus.
By pressing down the rotary knob it acts as selection
and menu.
In addition, the rotary knob can also be used
by pressing and rotating at once for additional
functions (default is set to volume up and down).
Long press on the rotary knob while in the device
menus returns back to the previous menu.