This listing is for one ApplePlainTalk Microphone for Beige Macintosh systems. Part number590-0670-Aand model number M9060Z/A.This is only compatible with the PowerMacintosh series beige Macintosh systems released between 1994 and 1998. Willwork with the Centris 660av, Quadra 840av, Power Macintosh 6100/7100/8100series, PowerPC based Performa and Power Macintosh 5000, 6000, 7000, 8500/8600,and 9500/9600 systems, Power Macintosh G3 beige G3 desktop and tower systems.This microphone is required for AV programs and audio recognition technologiesused by Apple products. Please check the configurations of your system prior topurchase to verify compatibility, no returns please. Multiple units areavailable for purchase.