Volume and On/Off control: Turn fully anti-clockwise to switch off. Turn clockwise to switch on and adjust volume up.
Squelch (mute) control: This outer ring control adjusts the mute threshold. Clockwise for up or closed.
Priority: Activating this control will switch to memory location 25. It also doubles as memory channel delete.
A clear display indicates a muted receive condition.
Steady green indicates Squelch open or a signal present.
Steady red indicates a transmit condition.
Flashing red indicates that the PTT has been on for longer than 40 seconds. (This is helpful for indicating a possible jammed PTT switch, which can interfere with others and flatten your battery).