A:Answer Dear Customer. The kit you have purchased includes the PRO-1080SQ camera model, but these particular cameras do not have any audio capability. We have recently launched a newer camera model called the PRO-1080MQB which features a microphone for 1-way audio. This is the first camera model to feature audio on a DVR system, prior to this it was not possible on a DVR due to technology limits. As your existing kit has 8 channels but only 4 cameras, you could add up to 4 more of the PRO-1080MQB if you wished to.
-SD, Swann Product Management