Several Hikvision cameras have built-in microphones for example
the DS-2CD25xxFWD-IS cameras and the new colorvu cameras with -LU
at the end of the product code.
Some of the new Acusense cameras that have -SL at the end of the
code have a built-in speaker that can play a pre-recorded message
or be used for talk-through.
The only camera with both a mic and a speaker however is the
Pyronix cube camera that is an internal camera and is
compatible with Hikvision hardware and software.
An alternative would be to use an outdoor 12 volt speaker/mic
connected to a camera that has an audio input and ouput which is
something quite a few Hikvision cameras feature.
