Two-way audio can add communication functionality to an outdoor CCTV system when the camera includes a built-in microphone, speaker, and compatible application support. A 4G solar triple lens camera with this feature may allow authorized users to listen to sounds near the camera and speak through their smartphones. This can be useful for communicating with visitors at gates, giving delivery instructions, or checking activity near a business entrance. The three lenses may provide different views of the surrounding property, depending on the design. Buyers should verify that two-way audio is genuinely supported by their chosen model and check microphone quality, speaker volume, network delay, and privacy settings before relying on the feature.