The PMMN4050A Speaker Mic Features Impres Technology, Slightly Larger Head, 3.5mm Accessory Port, Enhance Audio, Noise Cancelling. Does Not Include Orange Emergency Button. This results in more consistent output across all audio accessory types. For example, the IMPRES remote speaker microphone capitalizes on the MOTOTRBO and APX radio’s intelligent signal processing for superior noise suppression, speech clarity, and loudness—even in difficult weather conditions. Enhanced Audio Gain Capability (AGC): IMPRES audio accessories have significantly enhanced audio gain capability. When you are speaking either quietly or speaking in a normal volume but not directly into the microphone, IMPRES audio can detect that condition and will automatically increase the gain. AGC eliminates the need to adjust volume levels repeatedly. Intrinsically Safe, Impres Technology, Noise Canceling, Crystal clear audio, standard 3.5mm accessory jac, Windporting Technology. - Add a 3.5mm listen only wire for the ultimate accessory solution in high noise environments!
PMMN4050, PMMN4050A, PMMN4050B, PMMN4050C
APX2000, APX4000,  XPR6100, XPR6350, XPR6380, XPR6500, XPR6550, XPR6580, XPR7550, XPR7350, XPR7580