Navman MCB 7270 Basic Operation Key Functions, Vol/Pwr, An external speaker, if connected

2 - Basic Operation

2.1 Key Functions

Note that some of the keys on the radio chassis are duplicated on the microphone for your convenience.

The PTT button and the LOC button are available only on the microphone.

Key	Function
VOL/PWR	Volume and Power knob. Turn clockwise (right) to turn the radio on. Continue to
	turn until a comfortable volume is reached. VOL/PWR also adjusts the settings of
	an external speaker, if connected.
	The screen displays the most recent channel, channel band, and noise rejection
	setting. See Section 2.3.1 for an example.
	Turn fully anti-clockwise (left) until the knob clicks to turn the radio off.

7 NAVMAN MCB 7270 Marine CB 27 MHz Radio Operation Manual