This system (-16 X 8 HD-DVR, 2TB, 2K, CNV-) has audio option, but not as packaged. The recorder has four audio input connections with one audio out. The audio would require cameras (up to four) with audio to be added to make the audio available at recorder. It is packaged with cameras without audio. Adding audio is easy with wireless cameras that carry audio. Make sure any add on cameras are compatible with recording system.
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