2K5c2scab, it is a Nokia Bluetooth kit, i was pleased with one in my last car and since my wife and I drive each others cars it is great when you drive a car that is not your main one because it automatically logs you on.
Having said that I am disappointed, it does not mute the radio (but I was aware of that) it has its own speaker and microphone and basically with the additional engine noise in the Porsche it is not worht making calls, you are limted to shouting "I WILL HOME IN 15 MINUTES" after that it is useless, but very discreet.
Retro fit of a telephone module is best part of twice the factory fit cost, almost Pounds1,000 in UK so I will wait for the next one and order a factory unit, duplicate sim card and pain for my wife (Who never gets to drive it now anyway)though it is.