Midland Radio RG2W or RG2B User Manual

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Page 9 
2.3. Microphone 
 
(1)  UP and DOWN buttons These two buttons change the tuning channel.  
The first scrolls upwards through the tuned marine channels, the second 
scrolls downwards. 
(2) Button 
16 
For ease of use, button 16 performs the same function as button 16  on the front 
panel of the transceiver. 
(3)  PTT (push to talk) 
Pressing this button will begin transmission. 
(4) Microphone 
During transmission, speak with the microphone a few inches away from your face.