APPLE COMPUTER DESKTOP MICROPHONE PART# 699-5103-A (grey) For use with early 90's Mac Computers (Mac II, LC, Centris, Quadra) Not for use with late 90's Power Macintosh (Those use PlainTalk Microphones) May work with newer Windows machines (Connector is a 1/8" TRS jack) Some late LC models and Quadras may also require the PlainTalk Mic