Get to know the built-in features of the current 21.5-inch iMac and 27-inch iMac. If you’re not sure which iMac you have or want to find information and documentation about other models, see the Apple Support article FaceTime and Use the built-in camera on Mac in the macOS User Guide.
Speakers and microphones: Both models include built-in stereo speakers and mics for FaceTime, Siri, and videoconferencing. On the 27-inch iMac, a microphone array delivers studio-quality recordings for podcasts, voice memos, live music, and much more.