Motorola Original: PMMN4024A Remote Speaker Microphone. The IMPRES feature is a Motorola exclusive technology which enables radio to accessory communication. The audio accessory will identify itself to the radio and output is adjusted for each accessory type. It also provides for automatic gain control. So, if someone is whisperingor talking loudly, the person on the other end will not be able to tell the difference. Rather, they will hear more clear and consistent audio transmissions. One other feature associated with IMPRES audio accessories is the ability to program the programmable buttons on the IMPRES audio accessory independently of the radio programmable buttons. For nonIMPRES audio accessories, the programmable buttons had to be programmed to the same functions as the radio programmable buttons.

Fits: XBR6300, XBR6350, XBR6500, XBR6550