An A9 CCTV camera with two-way audio can combine video surveillance with voice communication. A built-in microphone and speaker, when provided by the model, allow users to listen to sounds around the camera and communicate through a connected application. This can be useful for checking on family members, communicating with visitors, or monitoring workplaces. Combined with remote viewing, motion detection, recording, and night vision, the camera can support applications in homes, offices, reception areas, shops, and other indoor environments.