APX 4000
Zone Batt Nuis
For BEST Results
• Hold the microphone about 2 inches from your 
mouth and speak at a normal conversation tone
• Shouting distorts your voice and DOES NOT 
increase radio range
• Always face the microphone
• Note: APX 4000  is equipped with Dual 
Microphones, one on each side of the radio
APX 4000: Transmit Operation
PTT Switch
Microphone