Midland G-300 Owner's Manual page 17

External Speaker/Microphone Jack : Your G-300 can be used with an optional
external speaker/microphone or headset, freeing your hands for other tasks. To use
an optional / speaker / microphone or headset:
•
Insert the plug(s) into the SPK/MIC
jacks
•
Place the earbud into your ear, and
adjust the mic into your desired
position.
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